Did you get all the Hero AA's? I mean there is tons more than Dead Hills. Like Bixie, Tainted West Karana and some others. But if you want to move on then I would go for TDS (the Darkened Sea) since you are going to need that progression done at some point if you haven't already.
But you could also jump to Shard's Landing which has some nice armor drops and other goodies but those are more 92 ish.
You are on the cusp of level 106 which is when you get access to “Conflagrant” gear which is available in the bazaar.
I like EOK and Frontier Mountains. Good gear and fun named. Trash is level 101-107 and named are 108. Armor drops are 105 but you can hold on to them
Don't forget Overseer.
Fanra has a great list of Hero AA which many have copied