Do Robe Mssl Prot, Arrow Fend and Shield Stack?

[MaxWilson]

I'll add that generally a shield has a higher than 80% chance of protecting you from a missile; the reason you'd want the Air Shield items is that shields lose effectiveness with fatigue, so mages are better off with Air Shield. IIRC the formula is

12 + DRN + (2*Shield parry) - (Fatigue/10)
vs.
10 + DRN + (2 if magic)

But on a normal unit, a regular old Parry 4 shield is usually better than an 80% Air Shield.

-Max