Mages can Crit, too !
+ 
+ 400 Gold = Sigil of the Storm (Total Cost : 1200)
- +250 Mana
- +8% Critical Strike Chance
- UNIQUE Passive - Uncharge : Critical Strikes no longer deal 200% of your total attack damage as bonus physical damage, but rather 100% of your total attack damage + 10% of your total Mana. Additionally, the total damage is divided into 50% magic and 50% physical damage.
- UNIQUE Passive - Overload : Gain 1,5% of your bonus mana as critical strike chance.
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Or the Overload passive could be built into a higher level item, which Sigil of the Storm builds into.
Also, I'd like to see some experimenting with current mana, or with tear of the goddess... :D
