Zero. Montiel was never the champ at 118; Moreno has always been there. And Nishioka was not the champ at 122 either. Neither was Vic at 112.
Just one Ring title with Nishioka. Darchinyan and Montiel were the consensus #1's, but Donaire was not the #2 to make it a lineal fight when he beat them. Donaire became #1 at flyweight and bantamweight respectively after those wins.
As far as Donaire's P4P status, I think the absolute lowest he could be is 6th. To me, it's: Mayweather Ward Donaire Marquez Pacquiao Sergio
"Lineal title" is subjective to the eye of the ranker. Everyone theoretically has their own "lineal champions" they recognize. So, yeah...
Interesting list, but i'd have Ward lower and Sergio higher Floyd Marquez Donaire Pacquiao Bradley Sergio Ward
Top dog Rafa Marquez never fought Hasegawa nor Sahaprom #2 and 3 who in fact, did fight each other in the year prior to Marquez moving up for the Vasquez match. So is it null even though they became the defacto #1 and 2 due to a miniscule timing difference? Add to the fact that the next number #3 in Sydorenko got brutalized by Donaire directly and Rafa ended up losing to Nishioka anyway so...