Saati is my main character, 80% of the time spent in the game I played with her, and this deck is my favorite and most frequent by choice (52 lvl 3.7 KDA 60% WR). I think this deck is the most fun to play, if you exclude bugs - the inability to shoot after using the ultimate, from time to time a complete loss of energy, etc.
Steady Predictions (5) - take only the maximum level, with this card you will be able to use Wallbang every 16-20 (approximately) hits on enemies with a Ricochet - this is 4 uses of the coin.
Designer Armor (2-5) - often you die - use as many points as possible, you can distribute the remaining points to Bullet Hopper.
Bullet Hopper (2-5) - not enough ammo - use as many points as possible, you can distribute the remaining points to Designer Armor.
Aggressive Tip (1-3) - it all depends on your aim (and reaction if you use a Ricochet near), if you rarely hit a coin, use 1 point, if everything is fine with the hit and you want the coin to fly faster and further, use 3 points. I don't see the point in using more points, because it becomes harder to hit the coin and it's just not worth it.
And last point use on filler - Step Off, Grab and Go, Costly Physics - everyone is good, but I prefer to use Grab and Go because 1 bullet in a close 1-on-1 battle can decide the outcome of the battle.
To better hit the coin, I recommend shooting a little below the hitbox.
Never use the ultimate during an open battle when the enemy is right in front of you (if it's not a tank with a small health reserve hiding behind a shield), do not forget about the possibility to cancel the ultimate when pressing E again!
Heads or Tails
Ricocheted shots deal 200% more damage to shields, reveal enemies for 1s, and heal Saati for 125 health.
Generate 5% Ultimate Charge after hitting your coin.
Increase your maximum Health by 160.
Increase the projectile speed of Ricochet by 20%.
Increase your maximum Ammo by 3.
Grab and Go
Generate 1 Ammo for each enemy hit with Blast Back.
Increased damage to shields, hitting invisible characters, receiving an ultimate charge when hitting any objects - all this gives us an advantage against these champions. Also, the ability of the ultimate to pass through objects makes it possible to finish off tanks with shields, including Terminus (But Atlas still blocks your ultimate).