We don't need a tankadin for murlocs btw. A holy one with a bit of pvp or stamina gear should work. The initial aggro will be generated by healing a life tap'ing lock, and the rest of aggro comes from consecration, earthshield, and spamming heals on himeself.
Oh, and especially after 2.3 this should work fine, since the pally will get +spell dmg from healing gear, allowing consecration to hit harder and draw even more aggro.