I agree that it is viable for all content, DRKoftheAzure would have to tell us themselves what the point of this post is I'm not trying to take a guess. My point is that dark knight is below the other tanks. My responses here to you is that warrior's selfsustain is in a better position than dark knights.
But you are losing about 1000 mana every time you do this (maybe partially mitigated by blood price), eventually you need to quietus or siphon extra times to refill adding in extra GCDs. This also drops quickly if you ever need to use The Blackest Night.
Tomahawk -> Infuriate -> Gauge build. 1 GCD to prep SC which I would hold while you build more gauge. The reason for gauge building is that Steel cyclone can restore a huge amount of HP, which means you have time to sit on this one while you build gauge and accumulate damage. While you build that gauge you are building HP with your combo which is an added bonus because while you build your mana on dark you get nothing for your HP. Meanwhile you still have Equilibrium on a 1 minute cool down if you are slightly behind on HP and then still Thrill of battle which is around an 14k heal if you are super desperate.
Also you are comparing 312 on 7 GCDs to 345 on 9 GCDs (ignoring added heals from combo of course?) on a GCD to GCD basis is a 9 potency difference in favor of war per GCD not adding in 107 potency from doing at least one combo ender, though this is ST so that should be kept in mind.
