We actually only played one comp. Lee Sin, Amumu, and poppy. We sacrificed the early game giving up altars almost every time. Then once we got ultimates poppy would assassinate high damage targets while mummy and lee sin locked up and killed targets. We also consistently abused lee sin having him solo sneak Vilemaw no later than 12 minutes in. We lost almost every early game, but we could always comfortably turtle under towers because of our combined ult threats.
To support this strategy, we pretty much always banned olaf, cho gath, and darius.
Our one loss was during the time where you reconnect to dc'd games, it was loss forgiven. It was from the old map. It's worth mentioning that we started the new map at 1666 then went to diamond from there. However, we had a really close game where a riven and rumble gave us trouble.
Oh God Stop and Ivaldee are my original 3s LAN team. I won my first tournament with those guys. Azure doesn't like the new map because it made his niche specialties a lot weaker so he's taking a break. Hell probably still make diamond by season end.