You don't seem to understand what mixed attacks means. If you used both physical and special attacks, then you must also split your EVs to fit both attacks, or weaken one. Using different types of attacks that are all special isn't bad, but using both physical and special attacks is. And I suppose a Wailord could survive a bolt, but he couldn't survive 2, and his physical attack is low enough that even if he had EQ he probably couldn't knock out an electric, and they could get in a 2nd bolt.