I've been messing around with Pest Control Matrix (because it's really similar to shadow price, so I'd you've never used SP, you might want to pick it up) and with my exotic slot not filled with a primary, if been using Invective. I've been using more than PCM actually... I've also been experimenting with other exotics since I've moved on from Thorn and want to find one for patch 2.0 and TTK.