I seem to have landed in a philosophy for building my bag that seems to work well for me. I work in four different stabilities for each of the common speed classes:
US: Should hyzer flip to turn if thrown low or hold a turnover the whole way if thrown high and flat.
S: Should fly straight when released flat or on a slight hyzer, preferably with a small fade.
OS: Moderately OS. Should fly straight and then fade quite hard, or fight out to fade from a small anhyzer.
Very OS: Pretty much as OS as possible, should always fade and never turn, in all conditions.
I can also look at it in terms of shot types, if it can comfortably shape these lines/scenarios it's probably good.
US: High flat to turnover
S: Tunnel shots
OS: Flex shots
Very OS: ... stupidly OS
I've found that this gives me more confidence in my discs and if a disc doesn't fly like the slot it's in, i'm probably looking for a replacement. Right now it looks like this if I were going to a tournament:
US: Proxy, Uplink, Crave, Tern
S: Envy, Hex, Teebird3, DD3
OS: Zone, Eclipse Reactor, Felon, Destroyer
Very OS: Zone OS, Justice, Flare, Panic
There's a few discs that maybe doesn't quite do the intended job:
Proxy (not US enough)
Uplink (too flippy)
Reactor (not OS enough)
But other than that I'm very satisfied. I also add a roller disc (Virus), a water driver I don't mind losing (atm it's an Octane) as well as a Berg in the putter pocket.