That invis is more op in pve than the dumb self rez. Locks can get man handled by enemies at revive (it happens). With invis im clear for a very long time without getting seen, hit, and can get out of there without even dying and fall back right into position to make the kill. Its even better when you can go invis like 3 or 4 times consecutively. Kneel for a good invis, melee an enemy for another invis, blade dance RT for a 3rd invis (and possibly a fourth depending on your super gauge). And even another invis if you got dont touch me gauntlets on. Just let a low level guy melee you when you get close to them.