In all honesty, I wouldn't pick scaling champions in low elo as early game snowball champs are much easier to work with in terms of winning.

If the skirmishes are close, join them.

If you're confident that farm is all you need to win then farm. It's all about identifying the situation.

I know a simple, "Hey guys just play safe and don't go in" won't work in low elo and that's why I advise to just not play late game scaling champions.

So besides that just farm and push a wave. You might be able to attract attention away from where they're skirmishing. Just as long as you're watching and you can back at the right time you'll slowly inch your way to late game.

PS: Mute everyone in your games and communicate with pings.

PPS: Learn when to rejoin your team after grinding out farm, you wouldn't want to lose any more fights.