If you want Excadrill to win, don't keep healing him. If he gets to much health, he gets unwanted attention. And look what happened to Magnezone. He went from 240 to 120 (?)...
I already have a Modest Infiltrator Noibat-F, so I'm good. What I really need is a Ditto with max Sp.Atk and Speed, as well as HP and the Defenses which are not as major wants