Moving out of the aoe's won't draw complaints from people who actually know what they're talking about. As for grouping mobs, there's typically 1-2 caster mobs in any given pack. Gather the melee mobs and group them at the caster mobs to make things a bit easier- then dodge as necessary. You may have to line of sight the caster mobs in certain situation but once you run something once or twice you'll get a feel for when this is viable.