Regarding Endgame DF and Tank Design

[Ri_ri]

Make Paladins heal, then. Or else you'll still have the same problem if you get a group with two Paladins.
Using Sword Oath to attack as Paladin doesn't work, as you'll steal aggro from the main tank.

[Yagrush]

Make Paladins heal, then. Or else you'll still have the same problem if you get a group with two Paladins.
Using Sword Oath to attack as Paladin doesn't work, as you'll steal aggro from the main tank.

I don't understand your first point. Also, the second point is addressed in the OP.

[Keneblerz]

Make Paladins heal, then. Or else you'll still have the same problem if you get a group with two Paladins.
Using Sword Oath to attack as Paladin doesn't work, as you'll steal aggro from the main tank.

This is only true if:

1. The main tanks weapon is worse than the Off tank.
2. The tank hasnt started his rotation.

To give you an idea. I fought garuda (HM) as an Off tank Paladin. If i go balls to wall with Sword Oath. I'll grab aggro almost immediately. If i wait for the MT's 2nd or 3rd rotation. i dont put a single dent into the target's emnity. It stays blue for the rest of the fight. Unless i use provoke like a noob :P

Edit: The above will happen for PLD + WAR combinations as well.