Another Champion Ratings Criteria

Is anyone at least keeping logs per champion of stats versus ranking? It is getting sooooooo frustrating doing really well and not earning a chest, for I'm sure a lot of people and not just me.

I realize the stats against teammates don't matter, it is compared to "All Champ/Role" scores. Somewhere there must be lists I can view to compare my performance against so I can figure out for myself what I'm missing? How else am I supposed to get better if I don't know what to work on? Not looking for a "what does it take to get an S rating," but "what types of scores have been earning S ratings on a specific champion/role since the Hextech launched."

Specifically, does anyone have suggestions where to improve upon my latest failed attempt: Malzahar Mid Lane (Solo Queue) 13/3/12 209 199k dmg dealt 51 wards placed (2 Vision)...the other team only had 48 total so I'm not sure how I could have used many more 2 turrets I had the final blow on, dunno how many other objectives I assisted with Team Win in ~44:00, no surrender Lvl 4 Champion Mastery