kinda depends on your preferences. thorn is a beast. bad juju is great once its upgraded, especially with mobs. invective is Meh. don't use it at all. the other thing to consider is bounty requirements. how much PvP do you play? thorn has the hardest PvP requirements, then invective. as both have drawbacks to dying. bad juju's PvP isn't bad just takes a little while. no negatives to dying.