This is wrong, the bleeds do not retain the legendary concentration bonus if you lose it while they are applied. At least I'm 90% of this based on my own experience. I had the #3 parse on Domo Heroic for a while, and I use a haste build. It's since been bumped down to #9, but I haven't done a parse with the new 391 weapon yet. I'm intrigued by this though, its such an annoyance favoring haste over mastery both for reforging, and when I have to go bear as haste is crap for them. It's a shame the way matrix is designed, otherwise I'm sure mastery would still be our top stat.
http://worldoflogs.com/reports/rt-4t.../?s=913&e=1424
That's the parse I had for Domo, good bleed up time but I think what really helped was good OOC procs during add phase, the swipe damage is rather high. 7 ravages isn't bad either, though I'm wondering what a good average number of ravages should be. I too have been attempting the feral leap when domo leaps out, however it can be tricky and if done wrong, you land in the fire momentarily and lose your buff.