The biggest problem with baby paladins and AOE tanking, is that they're really stingy with flash. Two flashes and rotating through the enemy list with the halone combo won't cut it in any dungeon where you can't use shield oath, especially if you prefer not to mark. To borrow a bit from the acting philosophy of Tug Speedman, if you want to have a good time with your pally at early levels, you need to go 'full retard.' By that, I mean total commitment. Use flash until your mana bar is empty then alternate between one riot blade combo and one flash per GCD until only one enemy is left, then just use your riot blade combo until your mana bar is full again. Stick to that, and it's doubtful you'll ever get something peeled off you.