over 4 years ago - Shurenai - Direct link
Increasing the damage of a wrench has no bearing on the resource return of a dismantled object, Only on how fast you dismantle it. There used to be a bug that allowed you to 'overkill' a block and gain more resources which made it better to do 99% of the blocks HP in one or multiple hits, then do an extra power hit, but, it's been fixed, so there's no reason not to just one shot things, and thereby no reason not to just mod the heck out of any given tool, pickaxe, wrench, or otherwise.

And if anything, the impact driver is more of an electric tool, not a gas driven one.