I prefer the ROTFLMFAO technique but that's just me.
(sorry that was just BAD)
I always monitor in MONO with isolation headphones on when positioning mics like this. You probably knew that, but I had to say something after that bad play on jargon above...
But seriously, if you haven't tried monitoring in MONO while setting this stuff up give it a shot. Helps in any stereo mic'ing situation to minimize bad phase relationships (or completely exploit them to desired effect). You may end up with small compromises between what sounds right to your ears in stereo and what you lose when summed to MONO...but...yeah.
Party on, and tell me why I had to be a Powerslave and not an Audioslave!
War