Mechanist - Condition Mechanist - MetaBattle

Due to 机甲核心：翠玉驱动器, your signets will keep their passive effects while on cooldown, so you can use them freely without any downside.

Spam all your damage skills:

Priority

Remember to always use 管流激增 before all other spear skills to "focus" your target, increasing the effectiveness of all other spear skills against that target. Save 连绵起伏 for crowd control, it's not a damage skill. 管流激增 will always come offcooldown at the same time as 闪电矛杖/电气炮轰, so use them together.
Enter 手雷包 every 5 seconds to use 破片手雷; also use 冰冻手雷 and 毒气手雷 whenever they are available.
You want to spam your mech skills 翻滚重击 and 释能阵列 so you can place them in auto cast by pressing control + mouse 2 over the skill icons. 天空马戏团 can be used for damage or saved for crowd control.
When everything is on cooldown, use spear auto attacks.
You can use 超频纹章 for damage, or save it if you think the Mech will die during the fight. If the mech dies, you need to wait about 3-5 seconds for the death animation to finish before you can use the elite signet to summon it again.
Using 电气炮轰 will cause the Mech to fire 火箭拳. This is automatic and does not interrupt whatever the Mech is doing.

Your mech will tank most enemies for you. If using pistols, then you can also stay at range.
整流纹章 provides you and the mech with a good amount of passive healing as well as a strong, short-cooldown active heal.
位移纹章 is a short-cooldown teleport, stun break and condi cleanse without a cast time, so you can use it at any time.