Draft one player per round. Each role can only be filled once. You get 3 rerolls for the whole draft.
After the draft, play Quarterfinals, Semifinals and Finals. Every game produces 10 match moments: invades, solo kills, dragon fights, Baron steals, teamfights and clutch throws.
The engine compares role rating, event skill, synergy, clutch and weak-link pressure. Finals are harsher, so weak slots matter more.