For comparable AC, in the same 2 gear slots, you can have...
DT w/ +3 dodge + rit + chaosgardes = 2 more slots on the DT that can have helpful effects.
-or-
Icy + rit + 8ac bracers is good for AC, but less on the helpful effects.
In the end game, mobs are_going_to_hit_you_anyway. ~1ac won't make or break you. Its better to have DPS and saves. In fact, people are building Str + Con monks now and dumping (moderating) wis.
Icy is good to have around for a TR...