You can outpace the boss in turn 2 and beyond after he made his move.
How ? is there a way to play before an infinite amount of initiative ?
If you have more initiative than the boss, you can act before him in turn 2 and beyond, he is only scripted to force act-first in the 1st turn (Just dowload the editor and take a look at the encounter script)
One of the flaws of the Ai is that the enemies do not have initiative buffs or apply initiative debuffs, so you have lots of ways to outpace enemies: Peace of mind, food, equipment, raise wits like hell, use rest before fight, etc
