If you are queue of 4, the best strategy is to take all positions but top.

As long as you are not in low elo (bronze/silver) top is the safest position to place a random. Just ask them to pick someone that can build tank and still be useful and it hardly matters what they do. If you put them mid or jungle, nobody knows how they're going to coordinate ganks. If you put them bot lane, they'll be against an ADC/support duo on voice comms while you are not which is a gigantic disadvantage and unlike top laners, ADCs are useless when behind and supports explode instantly without at least some levels.

I see alot of low elo players thinking "lul we all hard carry put the random as support XD". Bad idea against a team who is almost guaranteed to have a bot lane on voice comms. You aren't doublelift if you are still in bronze/silver/gold, it is very hard to beat a halfway competent bot duo. And in this meta, feeding a lane is a great way to get 5 for 0 aced. The only risk is that top lane could feed an enemy Riven or Jax, but that's still far better than having TWO players fall behind instead of just 1.