Just got Supreme Slayer legit; interesting run too. I should have cleaned up the dungeon after just because, but anyhow...
Rolled Bleaty. Wasn't too happy to see that, since I'd gone in with the idea of hoping for Battlemage Ring + Crystal Ball + massive MA fueled fireball spike. The Gauntlets were to decrease how far I'd need to fireball them down.
Instead, I got Pactmaker (Consensus, Spirit Pact, figured I could juice my conversions to get my damage up) and Binlor (dropping resists? Hooray! My first attempt failed to rolling Lord Gobb and I got him down to 15 health even without a way of lowering his resists.)
Between Binlor and the Piercing Wand I was able to get Bleaty down to almost no resists, used Dodge + Reflex + WHUPAZ hit to knock him down to half after converting the Wand, all my healing potions (at +15 CP each, due to pact), a Spoon, et cetera, fireball spiked him down to ~60 or so, converted BURNDAYRAZ, took a chance with my base 20% dodge (had been hoping for CYDDSTEP or Badge of Honour, but no such luck) and lucked out, rolling the dodge. Then he was within my first strike range and got throat-stabbed to death.
I have to admit; wild ride, and I was a little impressed with myself because I'm not sure I've read of Bleaty being Supreme Slayed before. It's the perfect target for a Rogue if you can drop those resists and/or get CYDDSTEP *and* BoH.