@devil monowhite with Lyra? That sounds quite weird. Monowhite would imply an aggressive strategy, in which case Lyra doesn't fit very well.
I think Resplendent Angel is crappy and borderline unplayable. It's a 3-mana 3/3 flyer, which is unimpressive in the current standard because so many of the flyers brawl well with it (Rekindling Phoenix, Tempest Djinn, Seraph, Drakes, etc). It can be good if you get to make angels, but how many cards can gain 5 life in one card? Sinking six mana into Resplendent Angel is very costly, especially since the opponent could e.g. respond with Vraska's Contempt to waste your turn. Alternatively you can connect with Lyra, but if you ever untap with Lyra you are generally doing well, so one cannot count on that happening.
Shalai is not a bad angel (I ran her quite a bit in Selesnya tokens at one point) but she's definitely a role-player that isn't strong on its own. Again she doesn't brawl well with the most threatening flyers (she would have been
so much better as a 4/4). She's not good against control either. Yeah she's GW's only way to prevent Settle the Wreckage, but she's dying to Cleansing Nova and Kaya's Wrath. Protecting other creatures is a minor effect that's usually not important, and the mana sink rarely comes up either. Ajani is definitely the better anti-control card.
But anyway I should shut up and await the results of the first major constructed tournament, which if I'm not mistaken is happening this weekend
This is an especially special Standard, since one can't just expect the best decks from the previous Standard to still be good; the new shocklands are quite a deck enabler.
On another note I've kind of lost interest in monored. It's a decent deck, but it feels so coin-flippy. If I draw poorly there's no way to mitigate it, no way to outplay my opponents. Either I draw 20 points of damage before my opponent kills me, or I don't. That's not exactly a bad thing, and if e.g. I were going to play a match against the world's best player then I could play this just to remove the skill factor and leave everything up to luck. On the other hand, if I believe I'm better than the average player (and I do believe that), I should avoid the deck. Too bad I've already sunk some ~7 rare wildcards into it. It's not all a disaster though, I underestimated the number of wildcards I still have - about 7? mythics and almost 20 rares left, along with tons of commons and uncommons.