Maybe you could change a couple of Serra Angel with Baneslayer Angel (same evocation cost but better qualities)
and I don't understand the real utility of Resolute Archangel in a lifegain deck... I suggest to use Angelic Skirmisher (she's my favourite...)
You are making really good points here. Thanks for the suggestions.
To explain where
Resolute Archangel comes from: this is a deck I built only with the cards I had at my disposal at the time both in my MTGO and Real Life Magic collections. Therefore my cardpool was limited. Also, it started first as a green-white deck and not mono-white. But it was only meant to be a deck for casual fun matches.
But I really like the life gain synergies (it's pissing off so many people haha) that I wanted to take the deck to a new level and maybe play some 1 on 1 Modern tournaments in MTGO with it. Therefore I started rebuilding it as a Mono-White but still restricted myself to my MTGO card pool.
I'll try to get my hands on the cards you mentioned. Shouldn't be too hard with all those selling bots in MTGO. Could be harder / more expensive in Paper Magic.