Tracey:
There are archived posts somewhere on this site that basically explain all of this. I *hope* they weren't vaporized in the famous black-hole incident a while back.
No, you don't have to have the same reverb send level for all parts. One part can be completely dry, the other completely wet. But all parts do use the same reverb and chorus type + all their *global* settings (depth, rate, etc.) (and the same insert EFX, but that's another story).
What you are interested in is the reverb and chorus send levels.
Be careful with your terminology so we can keep things straight: "EFX" refers to the insert EFX = one of the 40 EFX. "Effects" generally refers only to reverb and chorus, not the 40 insert EFX.
For now, try to find the back posts on this subject. If they don't turn up, we can try to do a simplified how-to explanation.