Let me clarify.
I left the game a year after AoS. The FOTM build then used the magi staff (this was before spell books with stats and crystalline ring) so nobody could really use mage weapons besides the magi staff.
Now that I returned I see that this has changed with the new items. I'm a factioner and have been taking advantage of the arties, but there really isn't a good weapon for it. I'm currently using.
Folding Steel Glasses
Armor of fortune
Orny
Crystalline ring (faction one has 3 FCR, no need for inquis)
Fey leggings
Pendent
Various barbed kit armor to get 70s, MR, LMC, LRC... etc
A lot of people leave a shield off for easier chugging, but use arcane shield to compesate a -fc mageweapon, plus the 15 DCI is nice.
Every SC mage weapon with no -pen I've seen has been like 80mil. It's totally ridiculous. I've considered trying a wrestle mix with it. I would take advantage of skill items (crystalline ring, + skill spellbook). It would fit decently by dropping med to 80 and lowering SS, necro, and magery. Every dexer now spams disarm, wrestle would keep a ton of defense. You sacrifice some necro damage and some med for wrestle, might be worth it. With LMC and MR mana is rarely a problem anyway.