I saw a bloodmage build that’s just absolutely raining like 20 comets down at a time. Can I replicate that build on my varashta?

You won't have the mana to sustain those comets.

BM can sustain coz they use life as fuel for their spell. They also get way more life instant regen than you can get with mana

You can definitely do this. For CoC to proc more, you need your crits to do a bigger portion of the ennemy’s ailment threshold per hit.

Want more CoC? Then you need more damage. That’s as simple as this. There are no Bloodmage shenanigans involved, even though their Lifetap ascendancy can help with mana sustain, it’s not required.

Yes you can do that on Varashta, but your armour piece needs to be the covenant. Then you need to use lifetap for all your spells. That's the only way it works.

People don't seem to understand that raining comets is a matter of understanding how to rapid trigger COC. And the only way to do it reliably is with spell leech and "leech is instant" heart of the diamond or through fast metabolism annoint.

I can rain comets on my stormweaver just as effectively aswell, and I could easily swap to Varashta and do the same.

You would need to run the covenant to replicate it. It won’t be as good as bloodmage though. You need to be casting from life AND leeching from life to get close to this. I would also recommend getting some instant leech on a heart of the well to sustain then run 2 comets and it is nuts.

yes and no.

the other posters are greatly overstating the difference.

anyone can do a cast on crit+comet setup. especially any sorc/witch. Does Bloodwitch synergize with it well/better? yes. that is also true.

Stormweaver is also a better option for coc/coea then vrashta as well I believe.. (cast on elemental ailment. which is also a viable option.)

bloodwitch can make all spells ahve a 15% base crit chance. While cold spells have an 11-15% base crit normally. so anyone can focus on cold and get the high crit chances with the same effort. while fire/lighting have lower base chances, thus opens some options for bloodwitch.

mana cost is a major factor once you get high coc/coea chance. as you start vomiting out comets, its expensive. bloodwitch can convert some of the cost to life, and then with life leech and regen, outpace it.
stormweaver has "you have arcane surge", arcane surge effect, and inc mana regen to help. also spell crit, and infusions, which can go into infused comets.

You need a huge budget with cost efficiency to make it decent. My level 40 comets are 280 mana each and I'm constantly out of mana, but I also kill everything instantly.

Yes, im running a ice nova/CoC disciple. I rain comets but I also have probably 2 mirrors invested in the character, and still I struggle with mana sustain at times. BM is by far the superior option, but it's possible on disciple.

Yeah, covenant robe for life leech from spells. 100% crit chance on spark. Good dps to make sure it procs coc quickly. Spell cascade and energy retention on coc comet helps it rain lots! Lifetap support for the leech to work.

I league started invoker flicker and went spark coc after a week 1. I stacked es and used blood magic. Had es overflow leech from soul tether belt. Once i had really good divs later i swapped to mana stack.

https://poe.ninja/poe2/builds/vaal/character/Noelsie-6484/Fate_of_the_Flicker?i=0&search=name%3DThe_flicker

This build rains and does temples well becuz hh. Not as safe as es stack but mana does good enough. You can put this gear and make a similar tree with any acen. Invoker needs less spirit for coc tho :)

Edit: i tried ele weak doedre a few times. Didnt like the visuals.

Edit2: here is a search for tether covenant combo builds on ur acen https://poe.ninja/poe2/builds/vaal?items=The+Covenant%2CSoul+Tether&class=Disciple+of+Varashta&skills=Comet

Here is my varashta, comets rain. I found Frostbolt works best after tons of testing different skills cause high crit chance and magnitude of chill. I was using a shakepit for fork and had the line removed so I could ricochet until my damage got so high that I could just run kalandras touch instead.

https://poe.ninja/poe2/profile/wizrd049-5981/character/Bramblelash

Stacking hp and mana with a corrupt rathpith

Replicate? No. But you can get closeish by slotting in Pinpoint Critical on key skills and using ideal critchance jewels. A Rathpith with Cultivated critchance would go a long way as well.