#1
Should the strings on my guitar be all level or should the high e be closer to the fretboard using my tune of matic bridge on my epi les paul, or does it even matter what height the bridge is?
#3
Depends on the guitar. Depends if you like low tunings or not. There is no set to this and thats correct specs for a bridge. Every guitar is a little different. And everybody has slightly different preferences on the "best" action.