The craftable +3 on the gear is far superor vs the colorless slot.. So for item sthat don't gave massive benenfits, the 16 versions are quite a bit better.
Seems a bit broken.
The 20 version only gains greater evocation focus... So for melees using this for hte purposes of the nice guard + weaken construct ability, thats a non issue.
Add +2 to hit bonus in the craftable +3 = lvl16 version wins.
Mainly just gains AC..
So for anyone that actuall runs epic and knows AC does nothing:
Add lifeshield on the 16 version instead = far superior.
lots more examples im sure.
How to Fix:
Tier2 epic = Craftable +4, not near-useless colorless slot.