Regarding Sintech's suggestion, I would add up to not forget pressing the PRE button so you can take advantage of the EQ (insert pre EQ).
I personally use other method. Since mic pres output is line level I just patch the mic pre output into the line in and source the track input to line (instead of mic).
Then what you can do is route the output of both tracks to one bus (via the routing matrix) and patch that bus into the Multi-track Send you wish (DAW A/D channel).
Cheers,
Artur