Establish a safe soldier zone
From the first wave until the first meaningful crash, recall, or river contest; reassess whenever Q or E changes the trade window.
Use the first waves to learn whether you can hold the center of lane with Sand Soldiers without losing health to the enemy's return trade. If the wave is favorable and your soldiers cover the enemy's last-hit path, take short trades, then crash before recalling or moving. If the enemy has push or stronger early reach, collect CS and preserve mana for the next wave; transition when a crash creates a visible roam, reset, or river window.

Corki
Ezreal
Jhin
Kai'Sa
Kayle
Kog'Maw