You need to take another look at the Kontakt routing document. Halion and Falcon are pretty much the same: they have multiple layers so you can choose where to put the filters and amps. It’s just not set up by default to have the synth layout you expect. For your case, you just need to work at what amounts to the bus level in Kontakt.

EDIT: I'm assuming you already have Kontakt, otherwise you are going to find life easier in some other samplers. New Sonic Arts Nuance is a reasonable mix of multi-sampling ability and easy routing.

Cwitec's TX16Wx is more complex to deal with but the basic version is free.