yep - put your warrior in a group with another low toon and you got max available xp / 2
at level 9 - killing a lvl 9 mob you got solo 90xp (in a 2 person group 45xp )

my 4th and 5th warlock now level39 - followed by three lvl 70 wls with aggro felguards...
the toons are pulling with Curse of Agony(Rank1), assisted by the high warlocks - casting curse of shadow and the felguards killing every mob *g*