Parry/Counterattack/Martial Arts Options

[yesferatu]

Hey guys,

I can probably find *something* in the rules about these melee defenses but...how do these work:

Parry/Riposte instead of dodge (most of the combat skills mention at least parrying/blocking)
Counterattack instead of dodge (can you just take the hit and hit back?)
Defensive Martial Arts (Jujitsu, Kung Fu, using opponents attack against them)

Is it possible to injure your attacker on a defensive roll?

So...somebody tries to hit you with a katana, rolls like 10 dice to hit, you can:
1. Roll Reaction + Dodge
2. Roll Reaction + Combat skill to parry or block
3. Go on full defense and roll Reaction + Dodge + Dodge
4. ????