Solo dungeon spots for mages

[Guesty07]

Hi! Asking I'd anybody has any great solo dungeon spots for mages in some of the less busy zones. Just hit 20 with my mage and have found a lovely spot in Najena killing red/yellow/blue mobs and did a full level in about 2 hours. Looking for similar suggestions going forwards.

Level 20+
Zones I'm thinking are such as Paw, Permafrost, Cazic, Sol, Runnyeye, Kerra Isle etc.
Something a mage can do, ie. Hopefully nothing to split, certainly nothing more than 2 blues, ideally single kills, blue/white/yellow.

Let me know I'd you have any good spots that might be fitting. Thanks.