Hello there. I am here to give an answer to your strange question.
If you simply want to show that you are a good player and want victorious skin simply pick one: Flex SR; Flex TT or Solo/Duo SR. If you get to gold in one of this queues you will get the victorious skin in the end of the season (november I believe). But now something else. If you get gold or higher in both Flex SR AND Solo/Duo SR you will get a special reward along with the victorious skin. We don't know what this "special reward" will be so look for more information as the season get coleser to an end.
I hope that helped you and gave you useful information. If you have any questions feel free to ask me in any time. As always: Best of luck on the fields of justice!