Team strategies

Can anyone advice me some guides and/or videos about league of legends strategies? I'm not talking about mechanics or things like "how to lane and have the advantage". But more advanced team strategies (team rotations for exemple, or how and when to do an objective, when to avoid fights as a team, or when to look for a fight etc). I'm playing with my friends and we would like to learn more about how to play as a team (which is different from solo Q) to prepare for ranked flex or the upcoming Clash.
Report as:
Offensive Spam Harassment Incorrect Board