There's really not that much to it.
A cast cam gets a cast gear.
A billet steel core cam gets a steel gear.
The others won't last well at all.
Most of the issues that guys have with gears that *should* work is that the gears are not positioned correctly on the shaft. There is a spec for it and if it's not held, you will get gear wear. You can't just pull a gear off, put a new gear on and line the holes back up. It doesn't work like that.