I'm not goina to bitch about using search - but you could've found most of the answer by using search.
Defense cap is useless for a druidtank since you get it from "Survival of the Fittest" it makes you uncrittable which is the same a 540 defense on other tankclasses.
In regards to other stats there are different schools but currently most, if not all, druid tanks are going stam for endgame raiding.
Not to be rude, but what is the point of this thread?
Is it to ask a question about which stats you need because if it is frankly I am confused as to exactly what you want answered because right now you just have a copy and paste of the list I posted in my druid guide.
My alt warrior did a full 25 man clear in ulduar 10 hard mode gear and 2 pieces from normal 25 TOC.
Based on that I would say farm heroics for triumph and get a full 232 set or better depending on how available trophies are to you.
as for the 5 mans, spec feral and put swipe on your bars. there is nothing in FoS that is even remotely hard even on heroic as long as people kill the corrupted soul on the first boss and stop dps if the healer gets the damage shared debuff on the second boss. PoS is not hard at all, the only hard pulls are the 2 on the ramp after the second boss with 5 casters. Mark up the pulls and assign interupts and it is easy. The final instance is tricky and you need a good group or no matter how good your tank gear is you will not finish it. you cannot aoe in halls you need to mark and focus and CC the mercenaries, find a pocket shadowpriest and the instance gets 100x easier.