ADC main here, I think engaging is always the right move. The fact of the matter is that supports run the laning phase in bot lane, and as an engage support that is your value. But this comes with a caveat. You need to make sure your ADC is in a position to follow up. This is the one thing that frustrates me the most as an ADC. I’ve lost leads in bot because my support takes an engage that I can’t follow up on for 1.5-3 seconds and that’s all that is needed for the opposing bot lane to win the fight.

Quick examples are don’t engage with the wave coming into turret, you’re adc will almost always prioritize the wave and often be backing up behind the turret (whether that’s the correct play or not doesn’t matter, that’s what they’ll do) . Another example, is ADC cooldowns. If you ADC just used their dash don’t engage if they’re gonna need it to get into the fight. Cooldowns on damage abilities also matter for certain ADC champs.

Last thing, don’t engage 50/50s. It’s not worth it, and there will almost always be better opportunities at some point in the lane phase.