1) See attached.
2) This is a massive question with many answers depending on scenario. I could give a talk on this for about two hours. Trial and error..."forced wisdom", I like to say. Phase: I use a Radial Phazer Bank, or just flip phase on channels until it's right. Better yet: move your mics around. Last resort: move your waveforms around. It's sort of an engineering 101 thing..there's lots of info out there about it.
3) B15 is not versatile enough for big rock, punishing, slicing sounds. Hence: SVT, Aguilar, Mesa, Fender, other stuff I have.
Jerose: "Don't forget LEDs!...you need enough to effectively render an assailant blind...once he's defeated you can reward yourself with Pez".