I highly doubt that sas healing factor is as great as sabretooths, wolverine said sabretooths was greater than his own. wolverine #126.
When being x-rayed for his punctured head by logan, he sustained a massive tissue damage, assail fragmentation, even his sinuses collapsed. The frontal lobes were pierced with enough force to create arterial rupturing in both hemispheres. He healed and played the x-men for fools lol.
It was never said that the hole was created for wendigo, yes he was hunting him but he also knew that sas was comin after him, (he was after sabretooth for weeks with no success) which he did not want so he made the spiked pit and waited for him. (that is debatable,but it makes since,does it not?)
but the funny thing is that he was put down by the guy in the cabin with a machine gun.
Sas is just another hippie with a bleeding heart.