I killed malenia on my second try, basically first try (used clone on the first try when she's at lunge distance, that shit costs life, she oneshotted me. It wasn't a fight really.) via me and my clone spamming the rot breath on release. Cheesy as fuck cuz of clone with infinite mana spamming the best clone spell but yeah she died fast. Oh, I also got the bug where if she's rotted or being rotted or whatever when the transition happens she spawns with 10% life. So I cheesed her and she got bugged. Lmao.
Then I killed her tons of times with the 100% block shield before it got nerfed, then added the spell before they needed that too.
Anyway point is bosses are easy if you strategize. ๐