1: EXTREME over-investment in your Resists. ALL OF THEM. You're well past DR, which you can hit in 4 slots (Res, Res/End, Res/Rech, Res/End/Rech. The only thing you're giving up is a microscopic amount of running End drain. And on the passive Resist power, you don't even need that.
2: TURN OFF TOUGH! You're getting NO BENEFIT from having it on and sucking ppower.
3: Optimal minimum Health slotting is Panacea: Proc, Numina: +Regen/Recovery, Miracle: +Recovery
4: Optimal minimum Stamina investment is Perf Shifter: +End, and Perf Shifter: Endurance This setup, in practice, gives you slightly less recovery than 2 EndMod IOs. But you wind up being able to still refill your End bar even when your Recovery's been floored.
5: You're on a Tauntless Tank. (BOO! HISS! GO PLAY A BRUTE!)
6: Now that it can take something OTHER than Fear IOs, Touch of Fear is a nice power to Proc up.
7: Dark Consumption is a decent AoE power that also helps with your Endurance management.
Now, don't get me wrong. Your build's tough. REAL tough.
But if something can sink an End Drain on you, you may as well yank down your super-tights and hope they use lube.
You're also going to have gaps in your attack chain due to fewer powers available and End management problems.