Precision Strike leader ability has natural synergy with Renfri. It enables full leader use in R1 for early control and double thinning without overcommitment.
PS also has synergy with the Dragons package. It helps to destroy units for Saesenthessis: Blaze value, but there is also another big quality of life benefit. Myrgtabrakke can shuffle in a bricked Sentinel.
This list doesn't include tech cards like Squirrel and especially Pellar, while it probably should. Feel free to for example swap Hawks for both or one of those.