Trying to make a black hole sorc that can kill uber aberroth (glass cannon)

Anyone got ideas for what to use here?

https://www.lastepochtools.com/planner/ALJzlDEB

I did some calculations and with this planner the ignites will deal about 41m DPS, thats before area DR, so on uber abby its 4m DPS. Would that be doable with this setup? I think he has like 250m HP in total. 4m DPS also assumes perfect affix rolls and perfect uptime of him standing on blackholes and pressing black hole off cooldown, in reality its probably -33% if not more, so closer to 3m DPS.
I also calcualted that, unfortunately, despite all our idols being amazing scaler, the relic that increase effect of them isnt good enough, it only gives 33% more damage in total, which I dont think is enough for a primordial item (hell even the 2 handed sword gives us way more than that). The affix isnt rare enough so we have plenty of most of it already on passive tree and gear. So i think the amulet which double dips into uncapped fire res (on hit, so black hole would need to get the collapse node to trigger hits) will be more damage. I also think, potentially with the wildfire wisps, although I have no idea how they work or how long they stick around, but assuming we have 5 wisps up, thats about 50% more black hole uses, which would be an incredibly multiplier on top of the fire res mod (assuming the black hole they cast actually uses your tree, if not, the fire res cap ignite chance is good enough on its own)

Any ideas how to improve this? Yes, I’m aware this is very glass cannon, I just want to sort damage first and see whether its feasible before refining the tankyness. But if you see an obvious way to improve tankyness without losing damage I’ll implement it