That is one complex question that can not be directly or accurately answered. There are some traditional ways and methods of working style, but there are no rules you have to follow or correct way to do it. You do what you want to do. You do what you think sounds best. You try one thing, then try another, then another, then another until you have tried every combo you can conceive then you pick one the one you liked best.

Or... You can use your ears and listen to what others have done on recordings you like and try to copy them.

stereo oh and stereo room for drums
multiple mics on gtr that can be panned/mixed together to taste
vocals are usually one mic a distance mic gated is great ala bowie on heroes.
and yes your verb and FX are best in "stereo" for vox except maybe multiple delays