A wizard wouldn't really take any damage in this fight, his buffs are too strong at that point. Also I don't see how he would get surrounded, unless he did it on purpose. There is both a natural choke point and corners, in this fight.
A paladin/Chanter with investment in lore would kill that encounter rather quickly, just spam a few spell scrolls. With 8+ lore it would be a slaughter.
Yeah I tried Cali solo with no kiting or pulling on Potd. A tanky Wiz would not take damage here with buffs, surrounded or not. But I would just fight in a choke point, maybe pop a few summons in front, then spam AoE. Solo tanky Priest/Wizard's with Sanguine can clear bounties at level 11, I know this from experience.
A Chanter or Paladin wouldn't need the summons, but definitely not need kiting, either. If I was solo with one of those I would have lore enough to clear the fight with scrolls, if I wanted to be quick. They would both be tanky in a solo run.
A tanky priest haven't met his full potential, yet, at level 10/11 for sure, but he can be very durable.. and can level the fight with his own spells or scrolls in little time. Later he will be the, arguably, strongest class in the game. Such a fun class to play after avatar kicks in! ^^
You plan to start popping out videos when PoE2 hits, @boeroer ? I have wondered how you play, after reading comment from you here on the forum.
You are clearly very knowledgeable, but I imagine you have a unique play style. My impression is you like Monk/Barb classes a lot and I noticed you prefer to play with no injuries from knockdowns. Which made me think you must have a lot of knockdowns outside solo play?
I would be curious to see for sure.