Lucas Carvalho Santiago said:
Does it even matter? Staff of Magnus is 1-A power null, Sol would probably just die before transforming, DG still wins im my view.
The staff is low 1-C absorption, not 1-A power null.
As for Bware's comment. The end game Dovahkiin is stated to be unstoppable to his pre Ebony Warrior self. His Pre Ebony Warrior self defeated Miraak despite him powering up multiple time during and before the fight. Miraak effortlessly stomped a pre Miraak Dovahkiin who defeated Alduin. Alduin stomps 22 Jills with a single attack, so he's over 22 times baseline.
The reason I originally thought Sol would win is because dragon install's passive hax and ap advantage, but both of those need Sol to power up first. Sol does have the regen to ignore the Dovahkiin's initial ap advantage, but the Dovahkiin's 1-C absorption and being able to make a nightmare clone of Sol screws him over. And the Dovahkiin would start with both of those things plus everything else due to being an Elder Scrolls prisoner (I'll find the qoutes on it if it's needed). All of that ignores how the Dovahkiin's bfr into Oblivion time limit is probably non canon and thus Sol is bfr'd with a thought.