Would Illusory Weapon on an Assassin with daggers and Critical Agility work well? Daggers and Critical Agility provides by far the highest attacking rate of any weapon, so would an A/Me with 10-12 in Illusion bolster the damage output?
I would suggest a sword/shield and sword/focus. +16AR/+12nrg and dmg reduction and +hp are better than the small chance of double striking with daggers, not to mention giving you a strong healing sig which uses no energy and heals for a useful amount.