with the rules for flyers( including the range penalty to shoot at them and only hitting them on 6s on the turn they arrive unless you have AA units etc..) it is with good reason they are special permission only use units. you have to give your opponants at least some chance by being aware and prepaired to deal with them.
i've fought against the all flyer elysian list with 4 valks and 2 vultures and it wasn't pretty for me. its probably the hardest IG army to fight ever.
that aside, since you only have 1 and if your opponant agree's to it, have fuin with it.