Utilizing raw number of overlapping abilities and deck synergy to win. Heal with Soul Warden, Essence Warden, Soul's Attendant, and Auriok Champion while scaling up with Voice of the Blessed, Ajani's Pridemate, and Trelasarra, Moon Dancer. Scry from Trelasarrra and pulling out Squadron Hawk helps to refill hand and filter deck. The decks looks to use a good number of comes into play triggers on the same card, such as Spectral Procession and Kitchen Finks. Sideboard is a work in progress with bombs and answers, as always SB is open to swap whatever is needed for an event.
Generally speaking, this deck doesn't have much issue with other decks in the meta that win by damage, look out for combo and control. The low CMC curve allows this GW version of Soul Sister's to be aggressive and typically faster than combo and control but still able to scale into mid-late game. Mana base is a work in progress.
Counter-play can be a tough decision because Voice of the Blessed is the main beater, followed closely behind by Trelasarra, Moon Dancer and then Ajani's Pridemate; however, there are many enablers as well(sisters).
Edit: Squadron Hawk, Oketra's Monument, and Mistveil Plains combo out for more interaction and redundancy/consistency with the decks goals of gaining like to put counters on beaters. Which makes for:
15 Life gainers: Soul Warden, Essence Warden, Soul's Attendant, and Auriok Champion
13 Beaters: Voice of the Blessed, Ajani's Pridemate, Trelasarra, Moon Dancer, and Serra Ascendant
6 Removal: Path to Exile and Skyclave Apparition
6 Enablers: Spectral Procession and Battle Screech
Edit: Guide of Souls and Ocelot Pride came out, adding even more power to the deck in the form of evasion and more triggers. Cutting Auriok Champion and Spectral Procession for what effectively upgrades of the same effects.