How do I tell team fights it's more important to go for objectives then wasting time killing people?

Had a game where the game was 5v3 but the thing is that my team still chased the same 2 guys who just afk farm and because of that they wasted at least enough time for the enemy team to farm up till late. How exactly do I tell my team to go for objectives? Spammed pings, talking to them, etc doesn't even work for 4/5 out of the time. Is there like a secret way?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

Report as:
Offensive Spam Harassment Incorrect Board