i have to do a 2 person interview today where both interviewer and interviewee have to be recorded.
i have a Z1
shot gun
and one lav wireless system.

what is the best way to set this up so i dont get too much ambient noise and get a good sound out of these guys?

Maybe take along another pair of hands and use a boom and shotgun.

Based on what you have use the wireless lav on the person being interviewed, and use the shotgun on the interviewer. Just point the shotgun at the interviewer. I have done this in the past and have had good success.

Maybe buy a Lavaliere wired mic, i use one of these on all interviews

http://www.audio-technica.com/cms/wired_mics/742fb06dd066b3ec/index.html

I have A1U when using one lav wireless input 1 and use the shotgun mic input 2 and I get unmixed/mono sound. Input 1 I only hear sound from L side of the headphone and input 2 R side of headphone. Is there a way to get mix sound through input 1 and 2?
My current setting on the XLR module REC CH select ----> on CH1
If I set REC CH select CH1. CH2 I only get sound from input 1 only and no sound coming from input 2.

Please help.

Thanks

Saul