Just hit masters with this deck. Very simple playstyle. Just drop powerful stuff on curve. Aegis units are great weapon carriers and can be hard for the opponent to deal with.
I found the matchup with the variations of howling peak decks very good. They need to use a lot of their removal to deal with our units and considering they don't play many units themselves by the time Xo hits the board you pretty much have all your removal ready to go. Hitting howling peaks is easy to hit with the fliers.
Rakano aggro can quickly swoop under you if you don't manage to keep up in the first few turns. I'd say the matchup is in favour of the opponent.
Skycrag aggro is fairly even IMO, its not as explosive as rakano so it's easier to stay on top of. If you can grind out the first several turns it's fairly easy after that once you have big aegis fliers. They can still steal games early on though.
I feel like these are the main 3 decks worth mentioning. There was other decks on the ladder but these 3 were very prominent. The next deck I saw a lot of was different variations of xenan (save avigraft for vara)