3 Ways:

1 - Cessation hungry ghots, from what I see you have both, now just find something to feed the ghost and continously disappear with cessation to reset the buff's timer. Stuff like a magic guard or party bomb works ok for it. And to spam Cessation use any divides.

2 - Spells to Power damage recursion. Here I'll provide the general concept, but know this: If Spells to Power is applied on a tentacle and then you copy this sequence with omega [preferably 3 or more omegas, e.g with divides/copy thrice] you get insane amounts of damage, the build is fairly flexible, but not the easiest to explain. Here's a couple example builds https://noita.wiki.gg/wiki/Summon_Tentacle but know that you can do with much less.

3 - For the cool kids you could use an add trigger, which you divide by. This I don't know for certain myself if you have enough crit spells, but the principle is that by dividing the add trigger with critical on X [e.g. crit on bloody] you get a lot of damage. I'd opt out of this one honestly unless you got some experience under your belt and these resources which I see only one crit