Reply to Traktor Kontrol S4 with 2x Traktor Kontrol X1's - How would you map it for T2?

I am debating whether or not I should make the switch to get an S4 and keep my X1s to go with it.

I am believeing ahead to when T2 is out and I want to get ideas on how to map the setup and if it makes sense to get the s4. I will be wanting to map it keeping in mind it will mostly be decks a and b and samples c and d. I really want to have each sample slot have a filter/volume knob and buttons and maybe some dedicated hotcues for a and b.

Any ideas for mapping this setup? I may do just one X1 if I can fit everything in well.