[Jasper]

The Ethereal crossbow is slow and allows a Magic Resistance save. It's of little use against the primary assasination target -- mages.

Being able to retreat during assasination is a bug, and likely to be fixed to be ignored. Even now, retreating just means automatic death.

A Robe of Invulnerability on an assasin is a waste of _80_ Earth Gems.

Also, which assasin were you thinking of that has Air Magic?