Never mind me, just thinking aloud, mostly.

UNBOUND HANDS
Prerequisites: 90% hth, 90% dual wield, non-felar
An assassin can learn ambidexterity envied by most others while fighting with one or both hands free. With their mainhand empty, they automatically wield their offhand; if they use a single-handed weapon, they still get some extra attacks with the empty hand but at lesser effectivity. Unlike felar who are naturals at this kind of fighting, they do NOT get unarmed attacks while using two-handed weapons.

Mutually exclusive with UNBOUND BLADES.



UNBOUND BLADES
Prereq.: 90% sword, 90% dagger, 90% dual wield, non-felar
An assassin can become so nimble and ambidextrous with one-handed bladed weapons used in tandem that they may dual wield them even if they would be normally too light to use together. Applies only to daggers and light swords (below 10 lbs?).

Mutually exclusive with UNBOUND HANDS.

Here are a couple another suggestions.


Prereq: 91% nerve (maybe high dex as well)
Assassin gains ability to choose which nerve strike he wants to use.

Quick Strike
Prereq: 91% nerve (maybe high dex as well)
Reduced lag time from nerve

Fierce Strike
Prereq: 91% nerve
Assassin's nerve strikes do a small amount of damage (maybe equivalent to an elbow strike).

Any of these effects might be combined into one edge as well.

Menilin

The assassins study the body as much - and in fact would be better at the technique. Assassins nearly always practice surgery on live people :)

Yhorian.