It is my thought that there should be 3 raids per 2 mods. (every level cap)
The first raid would be like tempest spine, essentially a very large zone with no prereqs and 12 people can do it. Alot of mobs, alot of small chests, alot of optionals.
The second raid should be something like the reaver. A grind of getting whatever it is you need to get in, but once flagged you are always flagged, you zone in and fight the main named and whatever assorted friends he has, no prequest to get in.
The third raid should be a raid zone. This should be the culmination of a story arc. Maybe multiple end named bosses or something.
Any input from the froumites would be loved. Thanks all for listening.