Having a fully loaded flame gate, I am finding that after having a few Juggs stand in it while they break a wall it quickly depletes. My suggestion is to increase the capacity of the Flame Gate so it lasts a full attack at least. I wouldn't even mind paying more resource to fund the increased capacity. On a side note, does it not make more sense to fuel the flame gate with grog as alcohol is flammable?
I bet that future updates will introduce higher level caps for Flame Gates I agree about using grog to fuel the flames. It makes so much sense!
