>>19808282My personal preference is to have some investment in defense, and lots in special defense, with max attack.
That is, if you plan on running pain split. If not, a simple 252 HP/252 Atk is good enough, throw the extra 4 in any defense or speed to outrun Aggron/Azumarill
As for moves, Play Rough and Sucker Punch should be staples. The rest is up to you, I myself go for Taunt and Fire Fang.