If your current level on your profile is correct then in 10 levels you will get the skill Intervention for your Paladin. This is a very good skill to use on another tank if they are the one that is going to eat the/a tank buster, and if you know you won't need them anytime soon Intervention can be made even stronger by using either Rampart of Sentinal before using the skill. It can also be used on one of your other party members if you feel any AoE attack about to go out will kill them.

As well, when you are taking a tank buster on yourself the skill Bulwark can also be a good idea to use in conjunction with another skill. While it won't necessarily proc the block on the buster itself, it will most likely still proc on attacks after the buster thus giving you some breathing room while the healers get your HP back up.