I have a paladin 55 f2p right now.
My advice for future fellow tankers is, don't waste spirit ore on useless buffs like berserker, death whisper and focus because you kill mobs with skills not brute forcing AA and set hp pot to like 40% or lower because as a tank you have a skill to recover hp from corpse or self heal, plus you get the full benefit of the extra p.def from fortress passive.
In the instance you need to have shield bash at max lv because that's your main aoe skill, pop in your attack and defense scrolls and disable the auto pickup inside the instance zone, run in circles to group mobs together to kill them in a 1-2 skill.