OK, so, my computer died horribly because Windows 8 was designed by a tiny child so I don't have screenshots or a video
The loose description of the setup I used to win:
Gnome Bloodmage, Balanced Dagger, Apothecary, Quicksilver Whupaz Schadenfreude and Mana potions, extra mana (magnet fireball is safer), Slayer Wand, Compression Seal and and of course Patches and JJ.
Strategy: compress patches, do normal vicious Balanced Dagger things, get one hit of Extra Health and two or three of extra mana, drink a mana potion or bloodpool if you have to get around a punishment. You will have enough resources spare to do this. Hit level four or five and line up a level up, find Aequitas and do unpleasant things to him with your mana potions and bloodtopowa. You'll level off killing him and probably know where Goo is by now. Use your quicksilver to Whupaz him and continue with your gigantic potion spike.
Should handily and reliably win, as Gnome Bloodmage's resources are all things that can get by mana burn and poison, and the balanced dagger means other punishments just aren't a huge deal. The only issues are finding Burndayraz really late, which I think I'd avert in future runs by just magneting it.