Sauro set and item progression?

[Sokar 2]

Hi, one question about Saro set and equip progression:

I’m a Gladiator full AC set crit socked (1200 crit strike without chanter buff)

last night i found a sauro commander shoulderplates, and i have see that has only 5 manastone slot max 13 enchant and is not so much strong compared to AC set.... ( at same ench level)

so isnt Sauro commander set far strong that the AC set? ( ok sauro can be upgraded at 13 ,  AC only 5 but isnt a waste of time?)

What sould i focus to get stronger? skip sauro and try IS ?

 

And why a frind drop a piece of sauro commander that can be enchat at +15? and me only +13?