I tested this on dummies by removing trinkets.
Here is my unbuffed str:
Here it is with a single proc:
Here it is with double proc:
It is clearly stacking.
So unless there is something with the proc mechanics I am unaware of, I'll stick with double dancing steel as I suspect any difference will be remedied with the proc mechanic changes in 5.1.
It seems landsoul has gone back to 7.5% hit cap, so it must have been a test afterall
Ooook, now he is at 10.4% hit again... wtf, I give up. I don't see anyone else over hit, but he is the world's #1 warrior theorycrafter.
I'm mainly interested in the theory, etc, but I am not doing content that would warrant reforging between bosses (at most go fury --> arms if it's a difficult cleave fight).
The latest simcraft shows hit being really bad after softcap. Shows hit being 0.39 normalized for me.