Celtic Heroes

So i was wondering for levelling in general whether it be group or solo what yall prefer and think is best

If I'm solo, I will either use combos or a combination if xp, haste, and energy regen

For group, it just depends on my role in the group.

Solo I use a combo and if I dont have a combo I use xp, en, and hp.
Most of the time I use a combo in a group as well but it mainly depends on if I am going to be attacking as well or just healing