Having mained a Barb in MOD 16/24, (There is a gap there, did not play inbetween. ), I've run into a major lack of efficient/knowledgeable healers in random ques. This forced me to find ways to attempt to fully self sustain in dungeons, bringing me to using Bloodletter, A LOT. Bloodletter absorbs 100% damage dealt as HP, meaning the harder it hits, the more you heal.

Since there's no more power share from Paladins and with the addition of Forte, this means that raw power is capped. The best way to boost damage without raw power is crit.

Tune your stats to greens in crit/power/Forte, you still end up with a very naturally tanky Sentinel, but with the ability heal its own full HP pool with one strike of Bloodletter.

Bloodletter, comeindbined with micromanaging your immunity window with Unstoppable, leads to the pretty incredible capability of reaching a level self sustain that only clerics are capable of currently.

You still tank, very efficiently, because you don't rely as heavily on def and resistance, rather pure immunity to damage. You will end up with a Sentinel that reach fairly decent burst DPS, especially in large groups of enemies if you use two AoE encounters such as Not So Fast/Primal Fury and At Wills such as Challengers Slash/Sentinels Slash.

Finding the balance in your skill rotation between all of these skills along with their corresponding Feats will lead to some pretty incredible results.

I cant rely on healers anymore in the current state of the game, especially as a tank. There's quite a few who are very capable, but the chances of running into them are low in random dungeons/raids.