Earn priority without gambling the lane
0:00–about 14:00; first waves, level spikes, crashes, and the first dragon/grub setup windows
In the opening, decide whether your lane can contest the push or must absorb it. If your ADC can safely help crash, use the pressure to threaten Shield Vault and secure a recall or river move; if the enemy reaches level 2 first or your wave is large against you, give up marginal CS rather than force an all-in. Build Mortal Will deliberately, keep enough mana for the actual engage, and only leave after a crash or a visible fight nearby. Your transition is the first successful crash that lets you reset vision or coordinate a gank.

Ambessa
Briar
Camille
Diana
Fiora
Fizz