I'd highly recommend using SAC as the front end to SAW for recording as well. Its much easier to deal with from a monitoring standpoint.

No need to worry about live mode in SAW your previous question. 1) Off, 2) RME ZLM Protocol, 3) Tape Style - Playback / Input Switching, and 4) Tape Style - Input Always On.

Monitoring and live channel assignments are done in SAC and SAW just looks like a big tape recorder.