Angel of Vitality

Because damage remains marked on a creature until it's removed as the turn ends, nonlethal damage dealt to Angel of Vitality may become lethal if your life total drops below 25 during that turn.

Each creature with lifelink dealing combat damage causes a separate life-gaining event. For example, if two creatures you control with lifelink deal combat damage at the same time, Angel of Vitality's second ability will apply twice. However, if a single creature you control with lifelink deals combat damage to multiple creatures, players, planeswalkers, and/or battles at the same time (perhaps because it has trample or was blocked by more than one creature), the ability will apply only once.

The middle ability of Angel of Vitality applies just once to each life-gaining event, whether it's 1 life from Dazzling Angel or 4 life from Apothecary Stomper.