With respect to Mark (and his solid tones) a phase alignment/metering plug is the last thing you need IMO, you need to start at first principles and get the basics right.
I listened through the samples on Gearslutz and read the enormously complicated chain of gear being used :-o
- it will be impossible to make any decisions at all without a decent drummer behind the kit (full props to your son for holding down a groove at 8 years old though)
- You seem to have the GDP of a small country tied up in gear, is the kit at the same level quality wise?
- Once you get a real drummer into the room, tune the kit.
- Move the kit around the room, don't put it where it looks right, move the kick and snare around until they sound great, there will always be a spot or two where they come alive
- Once you build the kit back up in the new position start with just 3 mics, kick and a pair of overheads - forget compression for now.
- Get up over the kit on a stool or ladder and listen, place the overheads where they will capture the whole kit, not where they look pretty.
- I would consider trying XY for micing
- Move your kick mic and use damping in the drum to get a mice resonant tone with real weight
- Do not add anymore mics until you have a really good solid picture from the above. When you do add mics, decide why first.
Good luck,
Ruairi