Support Luminary

Sword	Default Keybind
愤怒剑击 -> 弧光剑击 -> 波澜剑击	Auto Attack Chain
利刃符印	`2`
狂徒防御	`3`

Shield	Default Keybind
裁决盾击	`4`
吸收护盾 → 吸收护盾	`5` → `5`

Staff	Default Keybind
愤怒箭矢 -> 灼热之光 -> 索敌审判	Auto Attack Chain
神圣打击	`2`
	`3`
	`4`
	`5`

Luminary Virtues	Default Keybind
	`F1`
	`F2`
	`F3`
->	`F4`

Radiant Forge	Default Keybind
	Auto Attack
->	`2`
->	`3`
->	`4`
->	`5`

Key Concepts

Support Luminary is a very simple and stable support. It provides a lot of Stability to allies while still having a balanced amount of heal and condi cleanses. It is quite tanky so you should alternate staying on node to soak damage from being dealt to teammates and being behind your teammates to wait for your cooldowns.

Healing

You provide stab for your entier team via 光耀勇气 and "坚守阵地！". 光耀勇气 will also Stun Break any ally in range.

For healing and cleansing you have 光耀决心, it's instant cast and has a quite low cooldown for what it does.

神圣打击 should be spammed off cooldown on allies. You can use it to blast 迅捷符印 for additional condition cleanse.

能量引导 is one of your biggest heals but it forces you to stand still for the entire cast time. You should try to cast it in a safe place but close to the fight. You should cast this after using 光耀正义 to have Quickness.

吸收护盾 blocks projectile after its Knockback and should be used again before it ends for 吸收护盾. You can double tap the skill for quick aoe healing.

决心姿态 is your biggest heal and should be used sparingly, this will most of the time fully heal your allies.

辉耀姿态 grants a great amount of barrier to allies and Dazes enemies at the end of the stance.

In Radiant Forge you're looking to press most of your weapons to take advantage of 光明启迪. For healing you're looking to use 夜光法杖 -> 复苏微光. You can also use 耀眼爆发 after using 夜光法杖 for some healing and Regeneration.