toxic rain pathfinder has little to no survivability.

TR is great build. Maybe next time name your thread "could you please help me with my TR build?" and not "TR has no survivability". You are basically attacking the build right in the title. Please, I dont mean any hate, just try to work on your communication skills on this forum :) Follow Remi's guide and you will have no problem whatsoever.

P.S. You can check Sumubu on my profile for some ideas. Note, it's from harvest league so it's guite minmaxed.

I thought the same. But what it lacks for defense it makes up with potion spam.

I can sit surrounded by mobs in 100% delirium and just spam potions without moving.

I am on console as well and self found basically. Crafted all my own gear.

I beat all content in the game except Sirus. I have failed all 12 times. I normally play on PC and never failed on Sirus in the past.