Arms DPS, hybrid arms/fury

Hi.
I am new to warrior in WOTLK and have question about arms in PvE. And in case you are wondering why would someone even consider playing arms in PvE, i have an answer - i dont like aesthetics of two 2h weapons and i hate simple specs, even if they are best dps specs in the game. In other words i like challenges. Also, 2 debuffs from 1 class for multiple (?) mobs is good.

So
the question(s)

From very few topics and youtube videos on WOTLK Arms PvE i conclude that Bladestorm (last talents in Arms tree) is not so good for single target and ok/good for aoe.
1. Why dont just leave this talent and pick Death Wish in fury tree? Something like this:
https://www.wowhead.com/wotlk/talent...30525300002001

Second question is conclusion from first, if the answer is "it is WORTH to pick death wish over bladestorm". In case its not - skip this question.
2. What would be the difference between bis FURY and bis ARMS (death wish over bladestorm) in ICC/RS25 in DPS in single target / aoe?

3. Here is even more HYBRID spec, something like this:
https://www.wowhead.com/wotlk/talent...05300000531003
But im not sure about this spec, since Enrage seems to be very random in comparison to Wrecking Crew. I will appreciate any feedback from experienced warriors on this spec.

I did around 2k dps less than other warriors, but trauma and blood fury bossts overall raid dps by a lot. Every raid should have an arms warrior

Except that it doesn't stack with feral's Mangle and rogue's Savage Combat.
And you will in 99% cases have both in competent raid and they will do way more dps than arms.

Arms is really only good for PvP, lvling (when you absolutly hate prot and want to gimp yourself in RDF queues) and possibly very fresh 80 when you don't have enough hit, expertise and other stats to really benefit from Titan's Grip. (till like 4,9k I usually overdpsed similary geared fwars on single target).