Baneslayer and Angel of Invention are both very good for us. Reveillark proved to be one of the most overrated Cube cards of all time for our group, nowhere near as good as those two cards.
Yeah I love this angel. I can see the appeal of Baneslayer, but I find AoI more interesting because it has a staggering number of interactions with other cards in our cube. It also helps that if it immediately gets shot down, you still get some value. Plus, sometimes the anthem is a huge pro.
My 630 Card Powered Cube
My Article - "Cube Design Philosophy"
My Article - "Mana Short: A study in limited resource management."
My 50th Set (P)review - Discusses my top 20 Cube cards from OTJ!
Angel of Invention is the second best white 5 drop imo, only behind Gideon Jura for the cmc slot.
I'm pretty sure Entreat the Angels is the best white 4,5,6,.., drop