this is about Zen master!

ok we all know that Zen master was about viral defense for the MA tree but we dont need that in CR2 so the thing we really need for the MA tree is ballistic defense, so what i was thinking that when we lvl the ablity at every 5th lvl we would get a 2% bounse to ballistic defense so when it is at lvl 50 it will total to 20% of ballistic defense. I think that would be good enough, so what do you all think about this change in Zen master for CR2.