Pointbreak
He obtained thousands of wisps, if 100 equals 1 million jins then he should be able to get his flesh and viscera to 10 million, and thanks to the strength added by his flesh refinement he should reach 1.9 million jins of physical strength. So even if his physical strength is lacking at least his defense should be able to withstand some blows and with everything added together killing them shouldn't be impossible. Like Nihility Law, spear spirit, the second form of the Overlord Spear Art and a Tier 7 Divine Spear should augment his power enough to kill it.