[quote=@rextremendum]
So frighteningly soft biology aside in regards to "bio-energy" and how this lets the cell quickly create new complex molecules, does that mean that shitty Life Energy folks create tumors? And can a life mage instantly win any fight by for example causing the cells in the opponent's brain, heart or eyes to replicate way too fast and fuck everything up? Seems OP. 

Also, when you say chemical energy, do you just mean things are fueled by burning ATP? Because that is what I assumed, but the issue with that is that there is not TOO much energy available, so I am unsure as to your desired power level for the setting.

Also, I'll get a character draft up soon, if that is OK.
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If they could focus it enough, beyond healing levels, yes, they could make tumors.  They could also kill people by overdoing it, or targeting a sensitive area and dumping an insane amount into it.  That would require a ton of energy, though, to give them a tumor large enough to increase cranial pressure and kill them or make them pass out in the span of a few seconds.  Also, things like that are limited by nutrients in the blood, so if there's not enough spare protein, your muscles can't grow, and if it gets too low your body would start feeding on your muscles.

I guess that would be a good way of looking at the energy, but then again, they are making fire and lightning bolts, so they would need kilojoules (1kj = .239 food calories, 25,000 v @ 60miliamps, enough to stop the heart if it goes through it, is 1.5 kilojoules/sec, though the amperage would have to be increased to go through the body.) of energy to do much of anything.  The limit on that would be their skill level and their caloric intake.  A master, creating a flamethrower style flame, would quickly burn pounds of fat.  They would need an insane number of calories in their diet or a lot of spare fat on their body to do that, and the fat would be slow to metabolize.  Beginners, like us, wouldn't be able to use hardly any energy, so our effects are extremely small.

Yeah, it's fine, though.  You can put up your character.