It just boils down to Rae being a very hard worker and it shows. Look at how much new material he keeps dropping. I don't think it's a matter of him appearing in the most songs on group albums.
The brutal offspring of Conan and Red Sonja.
Ol' Dirty Bastard was the most sexually active of the whole group if that counts.
i feel rae will be rapping til he dies. he has a natural talent. where other members of the group drop verses that make you scratch your head like "you actually recorded that shit", rae's only fuck up's in the game have been beat selection and album structure. i'm sure i could find a weak verse by him if i really wanted to but off the top of my head i can't think of one. i could name wack shit by every other general immediately
FCK A SHOUT OUT!
RZA picks the verses that go on the albums. And he has pretty good taste evidently.