Snare, added pet dps, spot heals, quick mez for charm breaks, undead charm, feign death pulling even. Atleast that's why I rolled a necro in one of these groups during Phinigel. Was a very nice addition to a group composition like cleric, enc, mage,mage, wiz . Which my guess is his group won't be too far off from that type of composition but I could be wrong. Usually you roll what will kill the raid mobs the fastest so you can say you had "server firsties" then many will reroll the main they actually want to play. Works out for people who love casters though .