I place mics individually each based on the best tone for that Speaker/Mic pair.
I don't view this a solving the phase as much as using phase as an EQ and it works wonderfully as an EQ.
As a starting point to calibrate and find the point of most phase alignment:
1) Track two mics as a stereo track (one left and one right)
2) Visually compare the waves to find the number of samples difference
3) Dial that into SampleDelay
4) I invert one of the signals (mics) and if my sample calc is correct, with the output set to mono, this will give the least level out. Note with one signal inverted, frequencies with the most output will have the least when use normally and vise versa.
5) Return the inverted signal back to normal.
With this complete you can now use SampleDelay as an EQ one Sample at a time.
With the Sonalksis Stereo plugin you can mix the mic, selecting 100% one mic all the way to the other 100%.