Deathstrike more

Stacking mastery helps with the spike dmg and yes its "optimal" to deathstrike every 5 or more second but if you spam it you're still getting the heals and tbh the dmg incoming pulls every bubble you give yourself off so quick that you should be spamming it anyway. Also using icebound fort and blood boil ( for the debuff) on a regular basis makes a world of difference. Rune tap as well.

I've just recently dinged 85 on my 4 dk 1pally team, and have about an average ilvl of 330 or so. I've found that I can do several dungeons with no cc at all, grim batol being one of them, as all 4 blood spec. The healing and dmg prevention this class is capable of just owns if you spam death strike.

I've yet to level my pally team so I can use my othe pally as a tank but imo the dk does just fine if you do it right lol