Not sure it'll help in this specific case but I'm currently using the LocationFu mod to recommend new and exciting areas to go to, although I am also doing every single instance (okay, I skipped the Stockades with my Hordeies.. although they may go there at 70) so the XP from those means I'm not having to do too many quests.

The mod does only consider the character level, not the fact you've got four more grouped with them, but since quest givers only do this too it seems to work out.