There are worse power hogs than the sniper. Check out the lightning(1000) and counter sniper(4000!
).
I think they should be priced according to their DPS. Let's use the fighter as a base.
These are all raw numbers (no multipliers).
1 fighter is 1200 dps/50 power.
Basic turret is 4800 DPS/300 power
flak turrets 3428 DPS/600 power
sniper is 2400 DPS/500 power
MLRS is 2700 DPS/300 power
laser is 4500 DPS/300 power
lightning is 88 DPS/1000 power
Counter sniper 0 DPS/4000 power
heavy beam is 42857/750 power
spider is 2400 DPS/500 power
I know you must be saying, "but cyborg, what about the multipliers and the lighting turret aoe?" True, so maybe those numbers aren't as bad as they look for some of them, but having used lightnings before, they are very situational. I'm attaching a reference page. Look at the tractor turret
So I suggest normalizing to the fighter with at most 1000 power for the best turrets, which happen to be heavy beams.