We'll see how long my plottin-n-plannin career lasts when I slate us for Threnal and Restless Isles.
Really, the only time we're kinda screwed is that 11-15 range where there just isn't much selection. It's gonna be Desert, Lordsmarch, and Gianthold, just like it is every time on every toon. I'm thinking we might be able to mix in some of the higher level house quests (particularly House J) that we don't usually mess with, but 11-15 is going to be a bit of a slog.
Here's my plan at the moment, FWIW:
This week - Carnival - party should approach lvl8
Finish 3Barrel, lvl6 and lvl7 quests - party gets into lvl8
(If we want to run Delera for anyone, it gets a little tricky but it fits in here somewhat)
Sentinels - party approaches lvl9
Necro2 (too much XP from Shadow Crypt to skip this) - party gets well into lvl9
Threnal (I know, I know, but we've never actually completed this pack) - party into lvl10
Red Fens (set items) - party further into lvl10
And so forth…
Fill-ins for toons needing extra XP to keep up:
Delera, Searing Heights, and Sorrowdusk
Things we need to discuss as a group:
VoN, various House quests