Rancor Collar / Critical Hit Rate

[Glacont]

I recently purchase a Rancor Collar, and I have a few questions I wish to ask My Fellow Warriors:

1) How does a Rancor Collar stand up to a Breeze Gorget on Ukko's Fury?

2) Can You provide the numbers on How close or far apart the gap is between the two?

3) How many points of DEX = One Critical Hit Rate Percentage?

I appreciate any information You can provide concerning these questions.