The 1v1 of all time (help)

I challenged my friend (who I am a higher skill level than) to a 1v1, just for fun. He didn't want to, because I would definitely win. I told him he could pick his champion and the champion that I play. he picked jinx v soraka. It will be absolutely hilarious if I can beat him on soraka (who I never play) good 1v1 builds, runes, masteries, summs, or other general 1v1 tips would be appreciated. Thanks

(P.S. I know that league is a team game and 1v1s are not the sole way to judge a player's skill. This is just for fun. don't rage at me pls)