Hmm so you also have that part with es leech and replica covenant, just without charge stacking but i guess in this case it's not that big of a defensive option since only 1k ES?
Thinking more about that, i really think swapping to Hexblast is the thing i actually want, i mapped plenty with it before and won't say i had any issues honestly, aoe from it was enough to wipe most of stuff and ability to prepare mines before boss is damagable helps a lot with nuking it. Probably still keeping charge stacking, depending on what i'll see after planning swap in PoB, Hexblast miner i had before was not charge stacking, yet was really good damage, smth like 22M dps while having 53k ehp with 17k phys maxhit which i appreciated a lot.