question about MCH

[Raldo]

1) It uses Overdrive automatically at the end.

I main MCH, and I can count the number of times I've manually triggered Overdrive on one hand. You should only ever find yourself manually using Overdrive if...
- The target is going to die before your duration is up and there are no other targets.
- You're 1~3 seconds before the duration is up and you're about to lose some potent buff(s).
- The target is about to disappear or go invulnerable for a period of time.

You can actually find evidence of this on the tooltip on Overdrive itself (though it's on the action the turret uses, so it's the one you can't set on your hotbar, but you can see it in the action list):

Rook Overload
Delivers an attack with a potency of 400.
Potency increases as Battery Gauge exceeds required cost at time of deployment.
The rook autoturret shuts down after execution. If this action is not used manually while the rook autoturret is active, it will be triggered automatically immediately before shutting down.


2) It will do the same amount of damage per battery spent. Two summons at 50 versus one summon at 100 will do exactly the same amount of damage.

I haven't personally done the math, but that's what I've read from people smarter than me. So, with that being the case, the best time to use your turret is when you have buffs on. If there are no buffs available, then use it whenever is convenient for you.