Catalyst - Celestial D/D Roamer - MetaBattle

Elite specialization basics

Catalysts gain access to Deploy Jade Sphere which drops an AoE combo field with pulsing boons depending on the attunement they were used in.
The Jade Sphere costs energy to deploy, you build energy by hitting enemies or swapping attunements thanks to 强能元素.
Jade Spheres are instant and can be used while casting skills or sitting in a CC.

General

Because of 再生纹章 you should almost always be casting something for the passive healing, even if it's just an autoattack that's not even hitting anything. An exception to this would be having high enough 困惑 stacks in which case you'd take more damage then the signet could heal.
元素迅捷 (the elite) is used mainly to reset the CD of skills 3-5 of a given attunement:
- Water for cleansing and healing.
- Air for CC and an excellent mobility tool.
- Earth for CC and combo finishers.
- Fire for raw damage, combo fields and an evade frame with some mobility.
Jade Spheres do insignificant damage, but that can still be useful because these are instant skills. Dropping a new sphere to remove 圣盾 from an enemy or consume 目盲 on yourself right as you're about to land an important attack can make all the difference.

Auras

You cleanse 1 condition whenever you gain an aura thanks to 窒息光环.
元素典范 grants an aura based on your current element when you execute a combo.
The spread of combo finishers on D/D isn't optimal for aura stacking with Elemental Epitome - it ranges from 0 on Fire to 4 on Earth (skills 3-5 + the dodge from ). This however can be remedied with good timing and a little bit of creativity by switching attunements at the right moment, causing some finishers to land in a different attunement.
Some examples for spreading out your finishers inside the Jade Sphere:
- Cast then quickly swap to Air to end up with a .
- Dodge on Earth inside a Jade Sphere for , use but swap to Water before the animation ends for a . Cast but immediately swap to Air for a Shocking Aura.
is the most reliable combo tool in the build - it's both a field and a finisher, so you're always going to get an aura when using this skills. In fact you can get 2 auras by swapping attunements while casting Frozen Burst, for example swapping to Air will give you a from the combo itself and a from Elemental Epitome synergy.
- Carrying over combo finishers from other attunements to Water is optimal. This is because is the only finisher here, and it's one that's always going to give you a . Since auras of the same type don't stack, using this in Water doesn't give you an extra Frost Aura, so using Frozen Burst in Water wastes the Elemental Epitome proc. Either use it a few seconds after you've carried out a finisher into Water (ensuring that you'll get both Frost Auras) or use it as you're swapping out of Water.
Aura combos like this from can only happen once every 10 seconds per attunement, so while it's possible to swap attunements for a different aura keep the CD in mind!
There are also some less complicated ways of obtaining auras. Water #4 and Air #3 are skills that directly apply auras (and flip over into a chain skill which lets you transmute them for extra effects or more cleansing via ). Another easy one is to simply swap to for a proc. These are all instant and can even be done while casting skills or sitting in a CC, preventing enemies from piling more CCs onto you.
Combo finishers in the build:
- Air's .
- Water's .
- Earth's skills 3-5 and the first dodge you perform after swapping to this element.
As the Jade Sphere is instant you could even drop a combo field in the middle of your dodge in Earth to obtain an aura.

Damage

Fire is where most of the damage comes from, followed by Earth and Air, then finally Water in the last spot.
and can both do good damage without any real setup. Burning Speed can also act as a gapcloser before unloading other fire skills.
is a quick attack that drops a combo field and could get some on enemies to set up Fire Grab.
should only be used on burning foes as it does significantly more damage that way.
, and are more on the filler side of things in terms of pure damage but they are quite useful in their own right and much more versatile than most Fire skills.
Air's Jade Sphere grants which increases your DPS in general. This combined with spam can dish out some decent damage especially against downed and CC'd enemies.
, and are all great CC tools for setting up burst.

Combo Examples

Low Risk Burst Rotation

Optional - if you're not in melee range or if you need to get rid of Blind/Aegis quickly before the next step.
for CC while evading attacks.
for Quickness.
and swap to Fire Attunement while casting it.
for damage and to get back into melee range after having used Updraft. At this point Convergence (which has a delay) should also hit.
. Now, if you have the energy for it then drop the Jade Sphere (F5) on Fire. If not, do it after swapping to Earth.
Swap to Earth Attunement while still casting Drake's Breath.
for evasion and an aura combo, which should give you and the target. These should make it easier to land the next CC.
for CC.
for damage. You could consider swapping to Water while casting CE for another aura combo, or stay in Earth for a bit more damage via the next step. If you stay in Earth you won't be able to carry a combo finisher over to another attunement though.
Optional - if you're still in Earth. We call this a low risk rotation because you're using CC, evasion, defensive boons and debilitating conditions to make it harder for enemies to touch you while putting a lot of pressure on them.

Disengaging Safely (make sure you don't have a target selected)

for evasion and to place a combo field.
Swap to Earth in the middle of Burning Speed.
immediately after BS to capitalize on the combo field of step 1. This is another mobility skill with evasion and you should be able to combo Magnetic Aura.
Swap to Air.
Optional - If enemies are still on you, use for more evasion and to CC whoever managed to follow you. Updraft makes you roll backwards, which is not the direction we want to go, so turn around before you use it then turn back before proceeding to the next step.
without a target to get away from the fight.
Either heal up in Water or wait a bit for out of combat regen to kick in, assuming you weren't followed. Using the elite for a CD reset just so you may use skills 4-5 again instead of swapping to Water is also an option, taking you even farther. If you use the elite definitely press skill 3 before you do, it's a "free" instant aura source.

Mass Cleansing/Healing

While standing inside a combo field, carry a finisher over to Water attunement (either Convergence on Air or any of Earth 3-5). This will give you Frost Aura.
Dodge for healing and cleansing
You should have removed at least 7 conditions by now.
There are many ways to proceed based on what your situation is. If you're free from conditions and have time to cast longer skills without getting bursted, do . If you're still heavily pressured by conditions, use skill 4 twice (once to apply an aura and once to transmute it). If you're still focused cast while swapping to Air in the middle of it, this will give you 2 Auras (and cleanse 2 conditions) - Frost Aura will reduce incoming damage taken while Shocking Aura can give you some breathing room.

Sustain

Water and Earth are the most defensive elements here as usual, but Fire and Air have a couple of defensive CDs as well such as evade frames on and .
Simply swapping to Earth can already help you out against direct damage as you'll gain from . Earth Jade Sphere grants the same boon plus .
Water is the best element if you want to cleanse or heal.
is a simple but effective heal that also cleanses conditions. A lesser version of this skill procs on your first dodge after entering Water Attunement, healing for a similar amount but only cleansing 1 condition.
- Both of these are AoE skills so if you see an ally in need you can provide some support for your team.
's passive mitigates direct damage while transmuting it (using the chain skill) cleanses 2 conditions.
is still a good heal but slower than the other skills, making it worse in emergency situations.
Water Attunement's Jade Sphere is, you guessed it, a Water field. While you can blast it for AoE healing with , it's best used shortly before switching to Earth where most of your combo finishers are. Unloading Earth 3-4 + the dodge is a great way of recovering a large chunk of health. The sphere itself pulses to help mitigate condition pressure.
is the only stunbreak in the build so use it wisely, but all the Stability synergy with the auras should help you deal with CC.
When damage starts to overwhelm you D/D offers quite a few escape tools. Most obvious one is , just make sure you don't have an enemy targeted. Chaining into would be a good idea too, these are 2 mobility skills with evade frames that also have combo synergy - Burning Speed leaves behind a fire field while Earthen Rush is a leap finisher. This results in both a Fire Aura and a Magnetic Aura!
is a low CD anti-projectile skill.