Machinist has a lot of areas for improvement.
First and foremost, Auto Crossbow not reflecting Richocet but Head Blast does is really confusing. The single target version should reduce cd on the ST skill, AoE skill should reduce AoE skill. Seems pretty straightforward.
Flamethrower is completely useless in 99.9% of content. Perhaps balance it so it consumes 5 heat charges to put a hefty dot on enemies. That way you can rotate Auto Crossbow and Flamethrower on AoE packs
Need some sort of AoE dump for the Battery Gauge for Dungeons. Battery Discharge lightning or something. IDK.
Wildfire needs to auto crit or DH Crit. It has a hefty CD (120s) and it's damage is laughable for that CD duration.
Second Wind as an ability sucks. Period.
A health potion does more healing.. The addition of Hyper potion makes Second Wind's healing amount and CD laughable.