Couple other things...
If you're using a 2 handed weapon and it has Balanced on it, you will never block regardless of any skills you have.
DCI check comes before parry check.
Evasion does nothing if you're holding a shield.
If we're talking sampire template here, just never hold a shield - unless you have 0 parry on the template. It's either 1 handed and you can chug pots, or 2 handed without chugging pots. Blocking is a beautiful thing, don't blow it on some shield properties

If you've never used Counter-Attack before, then you're in for a treat. Basically you can get two armor-ignores off at the same time when you block. Consider counter-attack as a stance, once you toggle it you have a chance to hit your enemy when you block. If you have armor ignore toggled, then when you block you will armor ignore. BTW, you can block throwing/archery, so yea, you can disarm/dismount people from across your screen with a melee weapon in your hand.