Of all the abilities so far that have been trying to deal with toxic, like Shed Skin, Immunity, Poison Heal, and Marvel Scale, my favorite is Marvel Scale. Immunity, Shed Skin, and Poison Heal are worse options because they undermine CAP's ability to be countered by the blobs (and Poison Heal is way overpowered.) Marvel Scale on the other hand does absolutely nothing to stop the blobs, but if someone like Aegislash or Gliscor poisons CAP it will give him a benefit that helps against much of the threat list, while certainly not overshadowing Analytic at all. That being said, I don't think this is the best option by any means. We will probably have a way to burn anyway, and I think we'd rather not be poisoned in the first place. It could make the difference between being able to survive that Shadow Ball or not, which is huge.
I also support Infiltrator like most everyone else.
On Regenerator, I have to say that's rather overpowered. I don't know if it would be OP in general, but it certainly gives Analytic a run for it's money, which is not what we want the Secondary Ability to do.
Filter doesn't seem that great to me. We already outspeed all the ground types in the threat list, and we were supposed to beat them 1v1 anyway.
Water stopping abilities don't help the concept.
I also support Infiltrator like most everyone else.
On Regenerator, I have to say that's rather overpowered. I don't know if it would be OP in general, but it certainly gives Analytic a run for it's money, which is not what we want the Secondary Ability to do.
Filter doesn't seem that great to me. We already outspeed all the ground types in the threat list, and we were supposed to beat them 1v1 anyway.
Water stopping abilities don't help the concept.