I got a A rank from a 29/1/0 3v3...
I played a match and I got 29 kills, 1 death, 0 assists, 90 minion kills and for some reason I only got a A! I was playing jungle Master Yi I thought I was gonna get at least a S- but I didn't ;-; does anyone know why? Here is the link http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2464854630/237514112?tab=overview
Edit: A similar thing happened here http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2464850600/237514112?tab=o
Plus, Unique passives that don't conflict with Bork.
Getting one of these for the Movement and Attack Speed is also a good idea.
I'm no Yi expert, but from what I can tell, people don't get both. Usually Phantom Dancer, because of its crit and its passives.