I'm just guessing here:
1st solo in Waste of Skin
1st solo in Halo of Blood
1st solo in Bodom Blue Moon
2nd solo in Dead Man's Hand on You
Of course until we either see it live or they say we won't know exactly, but I'm pretty sure it is:
-Waste Of Skin:
They alternate solos: Alexi, Roope, Alexi. The tapping is definitely Alexi.
-Halo Of Blood:
Indeed Roope's the first, "bendy" one, then comes Alexi with the longer one.
-Bodom Blue Moon:
I'm pretty sure it's Alexi all the way.
-Dead Man's Hand On You
Second solo means the one after the keyboard solo? It could be Roope, at least it's not instantly recognizable as Alexi's, but usually the solos are either Alexi and Janne or Alexi and Roope, not the three of them. Could be the first time, but I'm not sure either way.
-One Bottle And A Knee Deep
I could be wrong, and also kicking my own "they never play solos all of them in the same song" theory, but it may also be Roope-Alexi-Janne on the solo section, starting times 2:55-3:02-3:10. They sort of feel like three separate solos and the first one kinda fits Roope's playing style. The middle part I'm sure it's Alexi.