A position that I quite like (as a starting point) is found by circling the distance between the fingerboard and the bridge (the green cross).
I'll go for large diaphragm (sometimes M/S).
In addition I do like a small diaphragm condenser over the player's shoulder (on the side of the neck).
But as said before, it'll need some experimentation. Especially for blending with electrics. Perhaps you should even try the Boss AC-2 Acoustic Simulator?!
+1In addition I do like a small diaphragm condenser over the player's shoulder
+1
I use my Oktava's, one pointing to the 12th fret or something like that, and one over the shoulder.. or next to the players ear.
+1I use my Oktava's, one pointing to the 12th fret or something like that, and one over the shoulder.. or next to the players ear.