It's hard to say for sure. Both Baki and Oliva have their unique strengths and weaknesses, and it often depends on the specific circumstances of the fight.
The balance of power in the Avengers vs X-Men comic is quite fluid. It could be the Avengers with their high-tech equipment and experienced heroes, or the X-Men with their mutant powers and close-knit group dynamics. It really depends on how the plot unfolds.
It's not easy to say who has the upper hand. Archer has the advantage of experience and a more complete set of skills. But Shirou has his own tenacity and the ability to surprise. In different situations during the battle, either of them could seem to be in control for a while.
Well, it varies. In some stories, the Daleks' sheer power and ruthlessness give them the edge. But in others, human ingenuity, courage, and unexpected alliances can tip the scales in their favor.
Nezuko is initially 12 years old in the manga. As the story unfolds, her age doesn't change significantly in a traditional sense, but her character development is quite remarkable.