Originally Posted by
KaPe
Divine Insight used to be somewhat decent in previous tier, where it worked together with both set bonuses. Having constant Serendipity from 4pc meant you could cast more Heal/PoH and proc more DI, thus giving you more Serendipity and so on. Right now, though, it's competing with >50% uptime on 15% healing increase and losing badly, so no. It's not some magical talent that saves Holy from mediocrity. Without set bonuses, it's RNG that rarely comes in your favour.
And "blocking out druid heals". With Disc, maybe, but Holy? If anything, it's the opposite.