The more I look at tank role skills the more I think it doesn't much matter for paladin. They actually might be the most free to pick abilities of all of them. Provoke is going to be required on tanks. AOE provoke, silence, and stun will be up to fight design. As pointed out above you can take a tank buster ever 45 second without rampart and not even counting sheltron. If you really want to turtle up thrown rampart and reprisal into the mix and wow a pld can mitigate damage.