Maybe Corwin and Reywind can play during the week to get to level 8 too? They can easily do quests on hard or normal that they have already played on elite without messing up the bravery bonus. Murielle and Rhogu seem to still be at level 7 so they can help Corwin and Reywind get to 8.

You can probably find some quests you can do at elite as well. Tangleroot isn't so hard and gives quite a bit of XP. I soloed the entire Tangleroot chain on elite with both my paladin and cleric when you played Carnival. I just got a few hirelings (including a rogue). It was not hard at all.