Which leads are played by Mikael on Deliverance?

I don't think its THE Opeth album. I think My Arms, Your Hearse would be THE Opeth album. Deliverance is great nonetheless.
But it's hard to say whose solos are whose really. Unless you see them live or can tell the difference between the two guitarists. I don't have a good enough ear to figure that out though. Peter normally has one solo per song, I think.
 
Yes, Deliverance is EASILY one of the greatest albums Opeth has genoiusly created. Most of the solos are pretty evenly split up between the two in the songs i believe... the have almost the same abilities so its not easy to tell like you could, say, marty friedman and dave mustaines of megadeth.