i have been messing around with several rating systems and made some good results. however there are so much of them, that i wanted to ask if you have some which are performing very well and for which sports.

so far i developed an accumaltion system for the following ratings. in some cases it is better to tail the prediction outcome in other cases it is better to fade it.

these are the rating sites i use so far:
http://www.arghratings.com/predictions.html
http://www.dratings.com
http://www.masseyratings.com
http://dcindex-choop.blogspot.de
http://www.dunkelindex.com
http://www.dolphinsim.com/ratings/

had anyone of you used them before? what is your point on these. i don't take them as the only criteria to predict a game. Esp in the NHL this seems not to work.