Oct 1, 2013
Somehow I never spotted this before, how silly of me. Bear and Cat thrash is a separate bleed effect so if you really want to go crazy on bleed stacking you should apply bearthrash bleed on top of those juicy big cat form bleeds.
http://pajay.blogspot.hu/2013/09/dream-of-cenarius-54.html has the overall idea to apply DoC bleeds in 5.4
you can simply go to bear and apply one more thrash at the end. You will probably even have +physical damage buff too (but truth to be told, you aer better of with one more shred or mangle in cat)