I look for a combination of factors. In singles, I want a player
who has shown that he's one of the best in that particular singles
game, in a post position where he's not right next to the other
good players in that game. In order for me to select a player
in post 5 or lower, I have to feel that he is by far the best
in the game, or he's on a real hot streak. The exception would
be if a player drops in from a later singles game, in which case
I'd go with the class edge, unless said player has shown in the
past that he has no interest in playing in this game.
In doubles, I look for two players who have shown that they play
well together, and who also have decent records in that particular
game, in a post position away from other good teams. Again, they'd
have to be easily the best team in the game in order for me to
key on them from post 5 or lower.