When playing against 20% lower team ( or even more ) , then try to reduce your team as much as you can.
Like when you have 110% and opponent has 70% team, try to make your starting 11 like around 80%.

Trust me, I have tried it many times and work really well. At the moment 0 troll results or something like that...

Maybe it's just a luck, but as I have seen my past season, it does not seem so...