PSW 110 advice....

Hello. I have a pair of TSI 400's, TSx series center, Polk book shelf speakers (surrounds) x2, Onkyo book shelf speakers (rear surround) x2 and two psw 110's.

As far as phase on the sub is concerned.......I was told to put one of the subs on 0 and the other on 180..........many online sites told me to set them opposite of each other or they might cancel each other out. Advice on this matter would be great?

Also what recommendations do yall have as far as crossover for all my speakers? I have them all on small and I have the subs on 80, the fronts on 80, center pon 80 or 100, and the the four surrounds on 80 i think. what should they be on?

everything is running on a Sony str-dn1040. thx.