I put myself in a context where the best decks are : Treyst, Sigismar & Afanas.

My reflexion about Atsadi started with : why would you play atsadi ?

Playing big dudes is a bad play in Altered, since the best you can do is to 1-1 your opponent since they just have to play anything on the other side to 1-1 you. The reward you have for these bad plays with Atsadi is producing CA.

So the big question comes : what kind of deck is happy to do CA while doing 1-1 to you opponent ? There are three options :

1. A deck that is ahead in expeditions but lost CA to do so.
2. A deck that aims to fatigue your opponents. This would imply not only you having more cards, but also your opponents being out of good options being forced to accept the 2-0 for you at some points.
3. There is actually a 3rd option, being that if you manage to have much much more mana than your opponent, you could be able to 2-0 at some point and come back.

Option 2 is not viable for Atsadi at the moment and in the meta game, where decks are able to produce lot of CA as well (Treyst, Sigismar, Afanas) and Bravos is not really know for being a good control faction.

Option 3 is in my opinion not viable as well in the meta game, since deck are either too fast, or able to set up a win condition better than yours allowing them to 1-0 until the end (Hydracaena, Grand endeavor, 2x Haven in Treyst, Small step in Afanas...) not matter how much mana you have.

Therefore the most viable option at the moment is to try and go for option 1.

You need to use this extra CA Atsadi can provide, to compensate a lost of CA in the early game (to ramp or take expeditions)

Here are your best openings :

1. Tiny djinn - Chiron is your best oppening.
2. Any 1 drop and Bravos Tracer to try and 2-0 or 2-1 your opponent.
3. Haven warrior to try & 1-0 or 1- 1 your opponent.
4. Taking an expedition of advance while using twinkle twinkle on turn 1 or 2. This allows you to then use support ability to ramp a big dude.
5. If you cannot take an expedition of advance: Try to at least ramp (mana channeling on 1, mighty Djinn on 2) or set up a spindle for a comeback later.

If you manage to have advance in the early, you will want to 1-1 until then end. Otherwise, it probably means you have ramped or set up Spindle & you will try to go for a 2-0 at some points to comeback.

Uniques are what I had, feel free to put yours instead.