How're you doing HP-wise?
Honestly, I'd just go Spiritual and call it done.
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If you are perfectly fine on endurance and you think you'd do fine even if you had more recharge, go for Spiritual. However, if you feel you could use a bit more endurance but want the recharge, try for Agility 
this will give you a few more points on defense as well
Combat Kangaroos, Justice Server. First 50's
Jirra Roo Plant/Storm/Stone/Musculature Controller
Combat Kangaroo Rifle/Energy/Mace/Spiritual Blaster
Kung Fu Kangaroo Martial Arts/Reflexes/Body/Spiritual Scrapper
Tribal Arc Shield/Elec/Mu/Spiritual Tanker
Agility is great to use.
I have an Inv/SS Tanker who's having a devil of a time deciding on an Alpha ability.
The build already is above the soft-cap for s/l/e/n defense (50%) with one foe in range of Invincibility (I wanted a debuff cushion), and around 40% for f/c. It does not use Hasten. It does use Tough and Weave and the passives, so 90% sl res and 30-32% e/n/f/c.
I've been pretty happy with the build overall, this isn't about fixing various holes really. I was originally planning to make Musculature, of all things, because I often feel like a bad guy has just a sliver of life left, and Musculature would have defeated him. Endurance is generally fine -- it can run down in savage AV fights, but I've never felt like he was gasping for end.
But the addition of the new Agility and Resilience alpha abilities has me reconsidering. Raising defense & recharge with Agility or the exotic resistances & taunt with Resilience both look good.
Any thoughts?
If we are to die, let us die like men. -- Patrick Cleburne
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The rule is that they must be loved. --Jayne Fynes-Clinton, Death of an Abandoned Dog