Regarding Thug Luv, from what I remember, there are three versions:
First version - Bizzy Bone (two verses), 2Pac, and Sylk-E-Fine; different instrumental
Second version - Bizzy Bone (two verses), 2Pac, and Layzie Bone (this version was the first to "leak" back in late 1996/early 1997, I was a big Bone Thugs and 2Pac fan, so I was always keeping an eye on the song, even though at the time I was only 13 or 14), different instrumental (same as first version)
Third version (retail) - Bizzy Bone (just the last verse from the other versions), 2Pac, Layzie Bone, Krayzie Bone, and Wish Bone (there are two versions of Wish Bone's verse I remember hearing, but they are similar for the most part except for the last few lines), remixed instrumental
This is what I know, not from necessarily from research but from what I remember about the buzz preceding the release of The Art of War.
Regarding the other two songs, obviously "Confessions" is NOT one of them (since it has been confirmed that it was a studio cut-and-paste job). Also back in late 1996/early 1997, there was a rumor of a song called "Eternal Thugz" by all members of Bone Thugs, 2Pac, all members of Outlawz, and some Thug Life guys, and supposedly it was a long-ass song.