It's not very scary really.

You get Flash at level 8. That is all the AoE you are ever going to get that is going to be actually helpful.

Sadly, AoE tanking as a paladin can be summed up very easily. Flash, Flash, Flash

If people are attacking multiple targets, you do the same. You'll get some moves that combo together, use that on one mob, then move to next and do it again.

If you lose something, Provoke, then Shield Lob it. Then do your combo on it. Still don't have threat on it? Use Shield bash, then do your combo again...etc

Not so scary. You'll get it!