Finally managed to clear Crypt with my mummy air elementalist. Strangely it wasn't the greater mummies that threatened me the most (tornado, dispel undead, and flight/swiftness easily deal with them) but rather the guardian mummies, because of their stat rot death curse. I almost died using Tornado to clear out a pack, bringing my Dex to 1 and my int pretty low too. Used self-restoration to survive that, but that wasn't something I wanted to rely on for Crypt:3. My original plan was to get enough necro/summoning to use haunt reliably, but even after clearing everything short of hells and slime (plus Ash's extra experience from being almost completely cursed) Haunt was still only 'very bad' or so. Thank god for gauzy fan giving unlimited summons instead (sidenote: they seem to be immune to tornado as well, a big plus).
The last level of crypt had probably 2 or 3 dozen guardian mummies, plus the greater mummies and priests that would've been smiting me from a distance. Took a lot of stair scumming so that my elementals could clear the mummies out while keeping pace with my ability to resummon more (slightly hindered/helped by the fact that Crypt:2's stairs down only allow 3 elementals to accompany me down at a time). Good news is Haunt is Excellent now.
Still need +F, though. The quality of artifacts I've found on this run has been ludicrously abysmal. Lots of -atk/dam, -stats, useless stats (hunger, +Fr), lots of artifacts with only one or two modifiers. There were definitely a few gems but everything has either been obvious to use or completely useless to me, rather than a tough decision to tradeoff like in previous characters.
Slime, then onto easier Hells, Abyss, maybe even Pand and a [take off every!] Zig.