# All the achievements of his power and might

"All that he achieved because of how powerful and mighty he was" or "All the great things that he did because of his power and might" 

# the full account of the greatness of Mordecai to which the king had raised him

"the full account of how the King had made it known that Mordecai was great" or "the full account of how the king had honored Mordecai for the great things he had done" 

# the book of the events of the reigns

"the royal histories" or "the royal chronicles"