Leveling a 5 man group for the first time requires a decent amount of understanding and research. You are trying to level 10 at the same time and just now you realize that you can't que all 10 together?

Seems like you are a little behind in the research department.

Instead of trying this and trying that, just lvl 1 group at a time. Or lvl one group until your rested is full on the other group and then switch. Much easier to understand instead of wasting alot of time playing the guessing game for fastest xp possible.