Divine Protection Tank LRE
Crimson is a fun pally tank spec but I'm surprised there's no LRE for Divine Protection available. I think it would be enjoyable to have an LRE set up to have a tank spec dependent on Divine Protection instead of stacking block value. With the talents and REs currently available you can bring the cooldown of divine prot. from 3 minutes down to 90 seconds.
So maybe create a LRE that modifies the damage mitigation of Divine Protection to 35% from 50% BUT when your Blessing of Sanctuary is procced (block/dodge/parry) it also reduces the cooldown of divine protection by 2 seconds. You wouldn't need a lot of block value since divine prot will handle your mitigation...just need a bunch of block/dodge/parry chance.