If you've taken all train sessions you will have no problem in the skill or power part, so again, evolve or not doesn't really matter if you trained fully.
Im refering to winning the battle, not getting Val points by the way.
You need three valwin points to win.
You have to take many corruption options
and the horn to get enough power.
And you have to get
every skill point to have enough skill.
So it is as simple as picking power versus Michael and not picking the horn to need all three correct choices.
Given how often people ask, I'm going to say that's not an uncommon circumstance.
Not trying to be confrontational, but your statement that the choice didn't matter was inaccurate.