Help me spend my last 4 points

[Garov]

Here's what I've got so far http://www.wowhead.com/?talent=aVZV0tIxhzgMqzV0x

Here are the issues I currently have:
1. I used to love Spiritual Focus for the "oh shit" button. But with how heavy the prot tree is I'm currently thinking I might need to phase this out.
2. The new Improved Concentration Aura looks interesting. 30% less duration on silence seems like it could be real handy.
3. One handed spec seems to be an easy way to save mana for threat. Add that with reckoning and it might fit my style pretty well.
4. Imp Seal of Crusader for bosses might help close that mana gap with the new SA.
5. And there's always Imp Seal of Righteousness too.

I've respec'd into Imp Holy Shield, and now I'm completely confused as to where the last of my points should go.