>>49129036hurf durf git gud filtered etc.
nah just kidding
mewtwo and its shadow are pretty top end (because they're both consistent yet dishonest in how they force your opponent to coinflip) but ML only really has 20-25 relevant mons so you don't have a massively comprehensive threat list to try and cover
just make sure you have 2 answers to
>mewtwo>melmetal>dialgaand make sure there's no single mon that beats all three of your team and you will win more often than you lose without ever having to try
metagross is fantastic for this as it only dies to you losing a coinflip against shadow ball mewtwo and even then it's visible from space if they have it to begin with
yveltal and groudon beat all 3 but with a small bit of coinflipping involved against melmetal and mewtwo respectively and the rest is just "use what you have"
try not to worry too much, ML is the fastest bracket in terms of average match time regardless and no one will care about the season cosmetics when season 11 arrives anyway.