Clear Mind gave Ackster a splintered clarity as his body succumbed to the wrath of Berserk, amplified by the negative feelings of the miasma that had yet to perfectly meld into his Ichor and the conflict of his core.
Ackster's thoughts ran on two tracks as he watched his body's instincts take over and utilize his sources and force to pummel the golem. One track looked at and analyzed the fight, including how the golem still suppressed Ackster and broke his body repeatedly.
The other track running through Ackster's mind passed by, and picked up the idea that he should have enough to become a full-fledged infinity machine.
Ackster's Will relied on his willpower. But he could exhaust it. It had become a finite resource that required time to recover, even if he had the willpower to continue using it. Doing that strained his mind, rather than somehow using Will he didn't have.