i know that their utility comes at a cost of DPS. This doesnt mean they have to use the utility, but it is in some cases very nice to have it at hands when needed (anyone remember Delve 1.0 Absolute Terror?).
@byrth: yeah magic dmg started to catch up, the adjustments they made last year were nice and with some more adjustments/gear/traits it would have been up there at some point, but after the WS adjustments that made SAM wtf god sauce, magic dmg has fallen sooo far behind. The gap feels like its again back there where it started pre SoA start...