Hey bro. Just saw the update where you posted this. Couple things - I really don't like Daxos as lead ride in this, just not enough nut to build around in my mind.

If you want to stay mono white angelbabies, my recommendation is Lyra Dawnbringer - she's not *overly* expensive and is at least a lord for your angels. If you wanted to spend some money, you may even think about Avacyn, Angel of Hope or if not, I think even Elesh Norn, Grand Cenobite that's already on the list might be better - both of those last two are more pricey to get out, but the immediate benefit is pretty strong.

That being said you may have an easier time branching out into other colors - Black has a surprising amount of ok angels, and a bigger amount of good Orzhov (W/B). If you go this roue then I think Liesa, Shroud of Dusk would be your best bet, or Akroma, Vision of Ixidor and a black partner card. Again, Akroma is rough to get out, but angels love their keyword salad, so you can get some heavy mileage out of her when she hits the board. Either way, Baneslayer Angel is at an all time low and a great pickup for angel tribal, even without akroma handing her keywords out.

The last thing I might suggest would be Tariel, Reckoner of Souls - doesn't exactly fit angel tribal but gives you access to black *and*  red, which may or may not be helpful (there's a choice few red angels you may want to look at), but the big benefit to me is giving you a reanimator backup strategy that's... given, pretty risky, but fun.

Finally, just general deckbuilding... your big thing is going to be trying to fill out the angel roster in the 2-4 mana range. Pickins are slim, but there are some choices (and a few are alread in your sideboard), but with a little research I think you can thin out some of non-angel creatures in those slots with some better synergy.

Hope it helps!