[Yumyums Inmahtumtums]

A couple cool ones I've done when I got sick of the regular grinds:

Shaman - dwarf guards inside kaladim. There are a total of about 12 of them and if you're smart about where you park them you can pull 4 at a time and root rot without adding the others. Requires epic and can be nasty at times but zone out is right there. Total of 12pp/kill which is p nice. Additionally, if you bind at the Druid rings in BB you can gate, sell and kill the dwarven guards you encounter on the way back to kaladim before respawns. 50-54.

Enchanter - FV pirates. Charm the cartographer and fear kite everything in your path. Get a Druid for snares and you're settler from 33-42. Can honestly get like a level/1-2 hours once you get a rythym. Even faster if you can get a puller and another enchanter.

FV dog palace. Seriously, check this place out. I had no idea the drolvargs had a mountain hideout but they do. Crawling with enemies for chain pulls. Literally no loot but also no challenge as well.

TD spirocs also fear kiting. Get a proven and go to town.

Splitpaw - I love this zone for late 30s. In is down to the judges and park on the other side. It's a great place to pull to.