During a period where you are low you have two healers on you. The difference of 20% vs 30% healing is not going to be so perfect as to not result in some over healing. There are some exceptions to this like A1 savage and A2 savage, but in Rav EX and what I PRESUME will be a3/a4, the 10% I think largely gets lost in the wood work.

In any case, the 'massive' cds paladins have are not as massive as you think when you discount the shield. The shield 'is' important and not being able to block during clemency largely results in the ability being resigned to OT when savage auto attacks can interrupt it.