Sacrifice a high quality unit like 2* 4 cost Soraka so you can get lots of Mana + Damage Amp for your Blackthorn carries. Blackthorn Lux caps the board very high, but you can also play Alune instead.

Stage 2: Open with a strong AP opener, preferably around Blossom. Slam generic AP items and Malphite items for a win streak.

Stage 3: Add in useful 3 costs like Fiddlesticks, Cassio, Azir then flex around their traits. General rule: put items on upgraded units.

Stage 4: Level and roll for Malphite. You will often have to itemize and work with whoever you hit so be flexible. Once stable on Azir 2, Zyra, and Malphite, push to 9.