You are right if strictly speaking of only the armor. But I thought it was clear in the context of what I was writing that "light armor" referred to magicka builds that stack magicka and spell damage, since the original post was mainly interested in stamina vs. magicka builds. Sorry that the terminology was unclear.Look at your light armor passives. (1) and (2) dont exist. light armor NB does not have higher base damage, it is the same.I don't know what your usual targets are, but there are people running with 70% or even 80% crit resist. Without SD, you're not going to reliably crit them at all.Shadowy Disguise is also another tactic but it come at a great magika cost. But a Shadowy Disguise crit will do the same damage as a normal crit which medium armor will usually do anyways with their 60% + crit builds. but with out the SD magika cost.
Also, I don't disagree that medium armor NBs are better assassins. I was just saying that light armor magicka builds make decent ones too.