Do you mean for the Kingdra?
I'm going to use 76 ATK, 252 SATK, 180 SPE, though I don't know if that's the best if you plan on using it in OU, as I haven't thought of that. You need more SATK in Ubers because most pokes have higher SDEF, but in OU, I think I'd want Lonely or Naughty for a Mixed Kingdra anyway.