I've updated my calculator with the latest patch and used Naxx-10 level gear to run some simulation.
I've posted a very long post with all the rating, mechanincs, simulations in different situations and so on.
I'll post here only some consideration. If moderators think that I can copy & paste my posts here I'll do, I just don't want to fill a page with my post.
You'll find the full post here:
WoW-Europe Forums: Feral by Night Simulations
X theorycrafter above: You'll find there all the lvl 80 vs boss mechanics tested.
High armored boss:
4SR/5RIP/5FB: 4379 dps
2SR/5RIP: 4292 dps
Low armored boss:
4SR/5RIP/5FB: 4749 dps
2SR/5RIP: 4644
Bear vs High Armored boss:
Rage starved: 1961 dps, 2477 tps
Unlimited rage: 2781 dps, 4641 tps
Tank specced druid doing dps in dps gear/cat form using 2SR/5RIP cycle:
2934 dps without naturalist and OOC
3983 dps with naturalist and OOC.
Seing that number I think I'll go for this spec:
lvl 80 Bear Spec
that allow me to tank efficiently while doing only about 7-10% less dps than a cat-druid.