Thats two times per long rest +10 on ONE attack each.
I'd rather try to get advantage, use coatings etc.
Gloves of the automaton, which you can buy from Barcus in act 2, give advantage for 10 turns. But once activated, you can unequip them and swap for other gloves, and the effects will last.
Which now occurs to me should be doable, as there are vids of people beating the game playing with 0 for all stats, never levelling up, having only one hit point, everything is a Myrkul, and the like.
