Best with Executioner emblem. Focus Ezreal + Tank items first then rest on Ahri->Soraka. Elderwood Lux caps the board.

Stage 2: Open with upgraded Elderwood and slam items on LeBlanc or Xayah. LeBlanc can farm copies of units on your board so avoid fielding unwanted units.

Stage 3: Add more Elderwood as you level with Spellweavers. If you start getting AD items, play them on Xayah / Rapidfires.

Stage 4: Level to 8 and roll heavily for Ezreal and the 4 costs, only go 9 once you have upgraded most things.