I'm not sure what's going on here.

Started a new toon to level for fun (rogue). Was planning to use my warlock (ungrouped) pet to boost the toon. I grouped the boostee (rogue) with a third toon (my 80 mage). Kept 80 mage out of range and would tag mobs with rogue then have pet take them down. Was getting full exp doing this up until tonight.

Same exact set up but now getting a fraction of the exp. Am I missing something here?

Thanks.