Magic Bounce is ridiculous for this concept, simply because the first responsibility of every Magic Bounce Pokemon is not to die, and Belly Drum pushes you in exactly the opposite direction. Magic Bounce has such immense utility for a team just by its user being alive that giving a Pokemon Magic Bounce is tantamount to defining its concept as hazard denial. This is especially true for a Pokemon with great defensive typing. What we should be looking for in an ability is the potential to set up in more situations and become more difficult to revenge kill. I am particularly concerned that for a Steel/Flying type, Magnezone, especially Choice Scarf Magnezone, can shut CAP6 down so completely as to make it nearly unviable without Shed Shell. As such, I think the best abilities for this CAP will be abilities that mitigate the ability of faster Electric types to destroy this Pokemon--any Electric-nullifying ability would be good to some extend, but Motor Drive is the cream of the crop, since it would give CAP6 clear-cut opportunities to set up, immunity to Thunder Wave (very useful against Ferrothorn especially), and would make CAP6 much harder to revenge kill without giving it a generic speed boost that is universally useful. Volt Absorb is only slightly less useful, because while it could potentially give CAP6 a second shot at setting up if it was forced out once, it does nothing for CAP6 on its first switch-in, and does nothing to help prevent revenge killing. Sand Rush wouldn't be my first choice, mostly because I feel that Rain with Electric immunity works better with Steel/Flying than Sand does by weakening Fire coverage moves, but it does help us keep CAP6 from being Magnezone bait, and it would help us avoid revenge killing, both of which are laudable goals. It wouldn't be my first choice, but it is an acceptable one that would help the concept. I cannot overstate how dangerous it would be to have Scarf Magnezone take out CAP6 100% of the time. If this is the case, everyone will simply use Magnezone, and the CAP will never, ever be able to get off the ground.