It has always been this way. Sorcerers and Nightblades can use it, because they are slippery enough to do it often. And I would even argue, that Nightblade can only reliably use light armor, if they are vampire to make proper use of healing ward.
I have often met Templars and Wardens who were trying to play in light armor. They were mercilessly destroyed without having any noticeable damage increase themselves. I would always tell them, that light armor only works when you shield stack and even then..... Well, they switched to heavy armor and agreed with me.
I think, Dragonknight is the deadliest class with light armor however. You really notice the spell penetration on them and they have the bulkiness to sustain it. But again, only thanks to vampire.
Mag needs light armour to be competitive. The reasons for light armour are:
- crit bonus
- Penetration (the best pvp offensive stat)
- Reduced ability cost per light armour piece worn
The foundation for every competitive mag pvp build is to start with 5 light, then coming up with ways to get passable defense, sustain and decent damage.
Best way of looking at it is heavy armour’s passives are equivalent to a full defensive set. Can you get a damage set in heavy that’s equivalent to 5k pen, 20% or so reduced magicka cost and 5k crit? Yea, didn’t think so.
Where people make a mistake is they wear 5x light with no defensive set.
A 5x light armour build with one defensive set will destroy a 5x heavy mag build with all offensive sets.
In CP pvp maybe yea, if you’re running around solo you need to glass canon on live to kill anyone as you’ve been saying.
Damage output is still better 5x L with one defensive set then 5x H with all offensive sets... by quite a bit, so it still comes down to 5x L is better.
Mag builds basicly come down to tank up to your environment in 5x L at all costs.
Think of it this way, from 5x light you get:
As much crit as 2.5x a crit set bonus
More pen then from spinners
More recovery then 2x lines of recovery
As much cost reduction as that magic mastery set plus being a Breton