W/K tank might work on lower instances, but I don't think you will have a lot of success tanking harder modes. The aggro generated from W/K is quite low compared to it's counterpart K/W due to the lack of aggro generating skills and with the insane amount of dps generated by the top classes nowadays, it's going to be very hard for you to keep aggro.
It also just doesn't bring as much to the team as other tank combos do.
This post has been edited 1 times, last edit by "BlankMinded" (Oct 29th 2015, 6:21pm)
There's a few issues with w/k tank....
Firstly, Whirlwind is your only aoe aggro skill that isn't 5min cd. It has a 15s cd, and only has a 6x aggro multiplier (cross chop, whirlwind shield and shock strike are all x10 with only 6s cooldown).
Secondly is that none of the other elite skills have aggro bonus. That means you're limited to holy strike spamming, which only has a 2.5x aggro bonus. Not to mention you may run out of mana.
over long fights, k/w has superior aggro b/c punishment along with the 2min cds makes holy strike on k/w hit for more damage than on w/k (patk differences aside).
W/k is definitely "tanky" enough to run the instances, but aggro is the main issue. The main advantage is a low cd ranged skill, and lots of control skills for mobs (or bosses) that require disabling. If you aren't running with super high damage dealers, and/or no wd/w's, it is viable. But you will be hard pressed to find any "endgame" runs that don't involve nuking bosses in 10seconds with super high damage output.
Your opinion of your guild is that high eh?
well as far as people in my guild are I don't think I'd have too much of an issue holding aggro from what I've seen