tbh for ranked this is what you should be doing.
1 - Don't put yourself in a match up you are uncomfortable with.
Like in my case in ranked I wouldn't pick
into
or
because those match ups are hard to win and I could play something else. Although I will play
into
and
even though they are suppose to counter me I have a ton experience in the match up and I am comfortable fighting it.
2 - Play something you can make plays on.
No matter what your role is you want someone who can turn a game on its head if you need to in solo queue. You don't have the team communication and composition with your team to really play something like a Juggermaw comp. In solo queue everyone wants to carry because no one trust eachother. (for the record dealing damage =/= play maker)
3 - Play what you know.
Play something you know like you really know don't go first time
in ranked because an ally told you it was good or a pro played it in the LCS. Play what you know how to play and have experience on.