Secondary does not mean non-existent or don't use, it means it should be second to what you do best.
Also, healing is the worst form of damage mitigation in this game, this is not WoW. There is a reason the archetype is called "Defender" and not "Healer".
In the end, its your toon, and if you want to be 1/2 as effective as you could be, who am I to stop you.
You don't need Acrobatics, take assault instead
you'll do better with an end redux in enforced morale, the recharge is short enough, plus you have a ton of global recharge.
You don't need 2 travel powers, skip Super Jump, take Aim and slot a Chance for Build Up in there, that will make your Thunderous Blast actually worth firing.
Conduit of Pain doesn't need so much recharge, 1 slot is fine.
World of Pain could use more resistance slotting, you've only got it about half of ED enhancement level
Just an FYI: Rune of Protection's recharge can't be reduced
Slot a Steadfast Protection and Gladiator's Armor Def buff in something, that's 6% defense right there
Painbringer does not need any endmod enhancements, 800% recovery pretty much can't be eaten through