Okay, lets see if I got this right. Defense_AvoidanceDeflection is a modifier for your Avoidance and Deflection_Chance is a modifier for the modifier?
Oh and I found another one. There is Defense_AvoidanceBlock which is your chance to block with a shied and is a modifier for Avoidance and then there is Shield_Effectiveness which I assume is a modifier for the modifier.
Not to be accused of picking nits, but really is this necessary? How complicated is the math?
And one more question, what is Deflection? I mean Blocking is blocking an attack with a shield and Perry is knocking a side an attack with a weapon, so what is Deflection? What is doing the deflecting? Armor, magic, all the above?