[Lothiack Drake]

This is what I've been using.
Give your assassin an Etheral Crossbow(999 damage, armor negating + underwater usable), an Eye Of Aiming and a Robe of Invulnerability. In his orders tell him to cast Aim(Level 1 Alteration, 1 Air path required) then Fire and flee.

Any sugestion, comments or own "recipes"?