4.0 MCH is Weak

[Fannah]

Flamethrower would be better if it were a fire and forget ability. A 60 potency DoT where you could still keep attacking and build heat would be much better than what it is now.

Just to be sure you're not misled or misleading people. Its "60 potency DoT" is actually a 180 potency DoT. DoTs in the game deal dmg every 3 seconds. Flamethrower deals dmg every second. So you can multiply Flamethrower potency per 3 to compare it to other DoT skills.

And to compare it with normal skills, you can multiply it by 2.5 (the base GCD, so 60*2.5 = 150 potency) and then, for the GCD skill part, you divide your GCD skill's potency (like Split Shot) by your current GCD (according to your skill speed), then you multiply this number by the base GCD. So for exemple, if you have a 2.3s GCD, and you want to compare Flamethrower to Split Shot (160 potency), you can do 160/2.3*2.5 = 174 potency.
And to get the Potency Per Second, you just divide your GCD potency by your current GCD (so 160/2.3 = 70potency per second).