Perk: Countermagical training?

[BaHalus]

Originally Posted by Blind Mapmaker

I didn't find the specific perk unless you mean Magical School Familiarity which has the ability to Ward or Counterspell all the style's spells as one of its benefits. I agree that a perk that gives you the ability to Ward or Counterspell a whole college is probably balanced against Magical School Familiarity. Consider it stolen.

how many of such perk would be balanced? One or two? More than that would still be balanced?