I dont have personal experience with this comp, but if it helps at all,

it's a great boss farming group when you are a few levels above the dungeon. You're tank will almost never have aggro unless you give him a 10 second head start on every pull. You're almost better off just adding another rogue and evasion tank bosses. Your trash mob aoe will be phenomenal, and you'll have sap x 4.

it's pretty bad for group pvp.