Kytseo
I put only 1 point in Improved Judgements because I hear 2 muck up with threat rotations, & I decided to put that spare point in Reckoning for two reasons:
1. added threat just in case
2. because part of me wanted to fit Reckoning in it in some way
Reckoning has been debated back and forth about its usefulness in a MT build. I don't use it personally, as refreshing a full stack of Holy Vengeance only does about 15 damage each time. As for melee adding threat, well it doesn't add all that much since the majority of our threat is from holy spells.
You are correct about only 1 points in Imp Judgements, putting in two throws off the rotation. Ideally, you should never have a free GCD in the rotation for 100% uptime on Holy Shield as well as max threat.
As for Seals of the Pure, well, its not as strong as it used to be. At least, compared to what you can get now. Its now possible to get points in crusade, which is a flat damage increase and a situational increase to overall damage, depending on mob type.
This is my current MTing build that I'm using for Ulduar.
SpecEven with only 1 point in SA, I have 0 mana problems between Sanc and having Divine Plea up 24/7.