I don't know what the sage equivalents are but as a sorcerer you have two lovely instant casts in lighting strike and shock (ok, well if Force Bending procs) that are great for pvp if anyone is able to get close to you. With DOTs and such I rarely have a problem with a melee player.
If I decide to pvp fully healer specced, I can easily out heal one or two player's damage. And I am not really that good of a pvper.
If you want to hit stuff with a lighsaber roll an assassin, juggernaut, marauder, sentinel, guardian, or shadow.