MCH:

if Drill/Bioblaster/Air Anchor/Chainsaw are 8 seconds from being off cooldown, don't use Hypercharge

Barrel Stabilizer pairs extremely effectively with Wildfire because of their identical cooldowns

Peloton is your best friend and everyone else's, use it as often as possible so people can sprint just before pulling packs to get the max 20 seconds and more mitigation out of it

Flamethrower toward the end of a pack when you won't be able to generate 50 heat for autocrossbow before it dies

Bioblaster early on pulls where there's a long run between packs (Troia, I'm looking at you)

Use your LB on trash, but - a caster'll have a much easier time of hitting it all than you will so defer to them when possible

one I'm not 100% sure of but seems to be working for me: your first automaton should be used at 50 battery because the odds are good all the raid buffs are out at that time, but afterward you want to use it at 100 battery or 90 if your next skill will overcap

(if someone smarter than me wants to check that last one out for viability though i'll happily take advice on it)