base decay w/ MgS if need be equipped with RoBf and NSC
The Decay would cast at a level zero, due to the MGS. Let's assume the AMF would work at 100%.
So, whatever size the NSC are would then lower the AMF effect in total.
From that, you take AMF backlash as usual with Decay, which is then reduced by your RBF.
Give sizes, and we can plug in and show you the amount of damage you'll take, as AMF backlash is a fixed amount, depending.