Best urf champs and worst

Last weekend riot released a game mode called urf which is the greatest thing that happened to mankind and I'll tell you the two best champions for each role. First there's assassin and the best ones are zed and Evelyn with talon being a close 3rd place. For tank the best champions are Dr mundo and Volibear for marksmen its Sivir and Tristana for support its Alistair and Blitscrank, for mage its Sona and veigar and lastly for the worst champions in urf its Yasuo because ya infinite wind wall is op but his q and e CD don't get reduced that much and second worst is Rammus since his early game sucks and if you jungle your top will loose lane hard, and the enemy team will snowball off the lead you give them and you will probably loose. The last worst urf champion is shyvana since only her q will be useful unless she goes ap shyvanna and her e will start doing OK.