Runes in Diamond
Recently hit diamond on this account and am using tier 2 runes. Wondering how much effect actually buying runes will have on my diamond account? This isn't my main, currently hovering between master and D1, but personally i don't think they really matter to much in low diamond, but my winrate has been dropping ever since I got this smurf into diamond so wondering if I can attribute that to my play, possibly worse teams, or lack of runes.
EDIT: not trying to sound like a dbag saying I hit diamond without runes (although I'm sure many many people have who are a lot better than me. this is not me trying to brag in a post). Seriously wondering how much effect they have on play in medium elo games.