Image below shows my current Milotic.
But I've been reconsidering for a while already on breeding another one with a Mirror Coat move (since there's quite a number of Pokemon that carries Thunderbolt, Grass Knot etc).
Any suggestions on is it worth it or not? This build is pretty okay for the time being in my opinion, haven't seen anything one shotting it yet.
EVs are : 252 HP, 252 Def, 6 Speed
(ignore the Scald, putting it there as placeholder till Ice Beam is out)