Outmove your opponent by making the most usage out of the movement synergies that Scoia'tael has to offer and finish your opponent off with Geralt: Aard!
From my experience you would want to play Milva and both Cat Witcher in round 1 with one Dol Blathanna Sentry. You could play Ciri: Nova round 1 and try to 2-0 your opponent with Saber-Tooth Tiger, Cat Witcher Mentor, Golden Nekker, Gaetan and Geralt: Aard.
Golden Nekker preferably gets you Stygga Castle for another Cat Witcher Mentor. Gaetan can move all the row stacked units from the ranged row to the melee row which perfectly sets up Dol Blathanna Sentry for Geralt: Aard. Make sure to play your Cat Witcher Mentor on the most left and Dol Blathanna Senty on the most right. Guerilla Tactics can be used both offensively and defensively depending on the situation.
Here is a video where I showcase three matches of how I play the deck: