I do have a Ghorn I just didn't know if it was worth giving up an exotic primary.
Also, thank you everyone for the answers I'm very excited for ToO, I love PVP and PVE I'm weird haha!
I'd personally not use a Ghorn as if you do then for the heavy round you will end up sacrificing your primary and you might need it. Instead get a rocket launcher with Proximity detonation if you can, if you can't then just get any RL with high blast radius.