I'm using the traktor mapping from JaJa with great sucess.
It only has 3 pages, so the options page loads much faster [see note]. The deck stop button is pammed to key control. On the effects, it support "favorites" on the button below beat Fx selection (button #4) so you can get quickly to flanger / delay / gater.
Note: traktor settings is slow depending on the number of mapping pages you have. Its irrelevant how many actual commands you have there - only the number of pages. For example, the first page of JaJa has 2000 commands, and it runs fine!