the reason why all of their proc are weaker than hyperos, nepta, marianos, krak bd weapon is because sb proc doesnt add stacking dmg. (hyperos doesmt add stacking dmg yet more op than sb, dev try it urself)
so if dev were to "buff" only the damage from proc, it'll surpass hyperos dmg, but still weaker than kraken bd.
so the solution here is to buff the proc with either +%N stacking damage/proc damage(better than hyperos) or both.
but if the sb gun&bow were meant only for base damage, what can we do xD. Lets just wait for new arcane (in which i hope better than hyperos+kraken armor proc )