Next void diver attempt

[Estie]

Greater vaults; sandworm lair works, also deep angband. It is a grind, resting till level feeling is refreshed, entering staircase, if superb feeling cast vision and eventually youll get a big checkerboard vault. In the sandworm lair, it contains mostly magey stuff like spellbooks and rods, but cloaks are also common.

[KesTheHammer]

Half ogre vampire sorcerer, got Necromancy offered several times (and used undead form twice already), and Symbiosis.

http://angband.oook.cz/ladder-show.php?id=24762

Incredibly lucky (as per potion of self knowledge).

I've killed Morgoth by now, but I still don't have a cloak of air.

What are the best places to find one of those?