Last edited by celinamuna; 2014-12-20 at 08:39 AM.
I've run into this as well. I try to fill with Holy Wrath, Consecrate, or Light's Hammer (Holy Prism) there when I'm stuck in that scenario and hold onto the HP generators. Light's Hammer doesn't snap shot anymore, so when you use Seraphim, it should increase in power at the same time.
In fact, It's actually ideal to drop Light's Hammer just before Seraphim, so that you get the buff for all of the ticks. If you cast it during Seraphim, the Seraphim buff will expire before the last few ticks.