I have had a Mbox I use with Protools LE for a few weeks now, and I am about to go deeper into 2 mics recording.
I haven't found a simple way/switch to invert the phase of one of the mic to avoid phase issues recording with 2 mics, have I missed something ?
Yes as well as the "Digi" eq's have a phase reverse button.
Having said that, and at the risk of saying the obvious, in all but a few situations (micing a guitar cab front and back, snare top and bottom) you shouldn't expect phase issues.
Naw...no way to give you any valid advice as to mic placement in these situations...I'm not there to "hear" anything including what type of material your doing.
I would however suggest patience, placement, experimentation and your great ear. That'll be a good start.