Give paladins "Improved Flash", Double's blind duration (up from the 7.5 baseline, so 15, just like we have it now) and reduces the remaining recast time on circle of scorn by 2 seconds.
This should definitely depend on the armor you're wearing. AF armor for Paladins is so damn reflective, it really ought to double the potency of flash!

Come to think of it, it would be pretty darn cool if extra effects were tied to off-hand weapons, like the shield....