Something interesting occurred to me while thinking about Dark Transfer. So if I remember correctly, Dark Transfer is simply pouring Force energy into the cracks one sees in shatterpoints, as in the ability requires shatterpoint as a prerequisite. Correct?
So, if we observe the most prominent user of the shatterpoint ability in the mythos, Mace Windu, his use of the ability transcends the physical to the point where he is able to perceive metaphysical spiritual fault lines in the fabric of the Force. This has been noted many times from Shatterpoint to the Revenge of the Sith novel and he has feats doing it. So there is precedent for the idea is that Krayt could pour Force energy into not just physical, but metaphysical cracks in the fabric of reality.
See what he's doing? He kills Cade using Dark Transfer, then resurrects him using the same power. And we know he's doing more than just repairing his organs; he's making him see the same vision he saw while traversing the netherworld that made him learn Dark Transfer and "see the truth of things." So we know that Cade's spirit is at the very least in some limbo, and not fully in the physical realm. Yet Krayt is able to revive him using Dark Transfer. How would he be able to do that if his power were confined to the physical? To me, it's clear that, like Mace Windu, he's acquired the ability to perceive metaphysical and spiritual shatterpoints, and he's able to pour Force energy into these fault lines, either to destroy or heal.
So my proposition is this: could Krayt also theoretically perceive the weaknesses in his own spirit like he did with Cade's and pour Force energy into those cracks to essentially make himself more powerful by willing it so?