This is a basic mapping for Traktor to control 2 decks plus 2 fx units.  It requires the use the K2's latching layers to enable the hotcues.

Middle 2 channel strips are for Decks A & B: EQs, EQ Kills, volume faders, transport etc.
Outer 2 channels: FX Units 1 & 2: params on the knobs, dry/wet on the faders.

Layer 2 has support for Hotcues 1-8 for decks A & B.  You need the latching layers enabled for the bottom 4x4 switch matrix to access the hotcues...