Damage x10 (x5 for berserkers) is enough to take out mobs from 1 hit, over x10 as for me is redundant. And this is without the use of skills and CE. With skills (from 6 to 10 levels), x5 is enough (x2 or x3 for berserkers). But that's about mobs.
And above I described it when the servant has the maximum level. But with this mod, hands (in Russia this is the name of the farm of 4 * experience cards, I don’t know what they call it in USA) can be cleaned in 3 moves, which means that you can pump the servant very quickly. Question about having apples for AP and good luck farming ascension items.
I think you shouldn't take out bosses with one hit (especially any Kiar III / R beasts with 500k health on 1 strip and 1000k on 3 strips), since most likely you are firing for developers. And with this approach, you will be banned sooner or later.