My step by step guide to ping missing enemies.

Press V, click ally portrait. Press V, click a different ally portrait. Press V, click a different ally portrait. Press V, click a different ally portrait.

Now that I have my whole team's attention because a fallback ping was issued directly to each of them, with a chat message and a giant exclamation mark above their head...

I double ping missing enemy in whatever lane I'm in.

At this point, I do not hold myself accountable for anything that happens to them after that.