I've mapped the Z2 to Djay, but it isn't perfect. the play/pause buttons seem to stop working after a while, but i'm not sure if this is due to me mashing all the inputs to program them in.

FX - the fx ON button does just that, but for the first effect on its corresponding deck, and the knobs work like they should
Nudge - the fx selection buttons under the filters will pitch bend the track so you can manually sync them up, or adjust the phasing
Load - the browse and load encoder and buttons work the same
Shift+Filter - this allows you to adjust the tempo of the corresponding deck
Loops - they work similarly to Traktor Pro
Flux- The Flux buttons are now your play/pause buttons

There may be something else that i've forgotten to put in here, but it works well enough that i'll be using it in live scenarios shortly. There will be two files, one for your controller editor, and one for djay itself