I was going for a bomb build before the together update, and I managed to get a bomb enchantment on all the armor pieces that can receive it before they were removed from the game, and together with the woven ring and mottled black pearls, I managed to get a 100% chance not to use bombs, and a 2.5x bomb damage increase.
Alongside 6 10% physical damage up enchants (armor and spike gems), each multiplied by 2x, the concussion bomb, base 135 damage, reaches 742.5 damage, and that isn’t exactly to powerful for endgame standards (810 with oil, 2379.5 shattering, 2759 shattering with oil).
Bombs are unaffected by general Damage up buffs (eg. 10% Damage up from food, and many of the crucible buffs), so that’s really the highest it gets.
I personally think it’s kind of fun to play around with, and It’s certainly not game breaking or anything.