Long time carnage marauder here but, recently I have switched to anni due to how chaotic carnage is right now and the change to FS, Must say though I am enjoying anni, gets annoying against a skilled scoundrel/op healer that cleanses my dots, other than that though its a monster now they buffed it.
I will never play rage on my marauder, I hate it and its boring. Just like I don't play focus on my guardian, vigiliance ftw.