I suppose. I guess I hate the waiting afterwards. I can try it again, as this one saved game I have has tons of intellect!
But, for the hard battles, dealing 9-10K damage to every single stack still doesn't cut it.
Actually, my Warrior can win the Impossible Battles with smoother end game play, which is what made me so sad that mages couldn't do the smooth game play with no waiting! With the warrior, I would have to intentionally delay finishing the battle just so I can pick up the treasure chests.
I mean, put it this way. I've tried doing the Black Hole Blitz against Scrounger. Did NOT fare so well.

Double Pump Geyser, no go either. Pygmy Black Hole... poo.
But, I didn't do the invisible trick though! If I do though, then the raw offense is merely just icing on the cake.
And any battle where the 9-10K damage per stack would have won the battle could have easily been replicated with the Warrior Ranged Army, with zero mana recovery required.