Depends on your play style, I play as a defender and I'm usually in the top 3. Works perfect when your getting swarmed in PvP. Just pop the sheiks up let your health regen then step out with that over shield and own the other team. It's perfect when you have one charge you too. I've taken 2 melee hits and a shotgun blast inside the bubble and thanks to the high damage resistance perk I killed all three of them. When you use this play style though you're better off defending points instead of taking them