I made a flexible ww asn that I've been dueling with a lot for the past couple months. I find myself using my 65 fcr setup more and more, and the same with enigma. However, this build seems really limited because of its inability to change gear for specific matchups. While I agree with maxing mb, 65 fcr, and the use of enigma in many duels, I think you would do well to pump your stats a little more to allow the use of angelics vs melee.
One solution that comes to mind is using a nice fcr circlet and a +2 ral crafted amulet (only needs the minimum of 5 fcr to hit 65 fcr) instead of .08 valk. Although the amulet will lack the stats of storm hide, you will get an extra +2 skills, some nice stats on the circlet, and you will be able to switch out your amulet for angelics when needed.