First try. It was a tough run, but not particularly notable among class/dungeon mismatches. This is definitely comparable to purist Monk on Cursed Oasis, or purist Berserker in Slime Pits. Doable but difficult runs that may need a bit of scumming. Don't know what you're complaining about here.

I had to choose between Parched and Unstoppable badges at the end, as I had a level 9 and level 8 AA left on the field with about 5 layers of DP each when I ran out of resources. I decided to go for parched.
I got a bit lucky with subdungeon (though a vampire cannot properly leverage zombie money, it was still five extra blood pools and a bit extra cash) and glyph finds (had GETINDARE and HALPMEH, pretty much perfect for a vampire) but my shops were barren and my best find was a bloody sigil. Even with the gold from zombie money to facilitate extra CP purchases, I only ended up with 5 stacks of lifesteal in the end (~500 CP). Top-level was fully-explored by the time I was level 5 and I began the takedown on the Shade boss at that time.
I've also got to saying killing that level 5 Thrall was a mistake; I could have drained him repeatedly at higher levels, but because I took him down early that was not possible.