Mmmm... you really need to connect your argument. You pretty much just posted two separate things, and then your conclusion without really linking them.
DD Vos was stronger than Hett, but not *that* much stronger, A'Sharad was a very skillful Jedi who was a very tough fight with post RotS Kenobi.
And then Krayt's way above A'Sharad (stronger than DD Vos, too), so it's not like how Vos compares to Hett says much about how Vos compares to Krayt/the IKs Krayt fought.
Draco and Ganner are stronger than the IKs who fell to Krayt for another factor. I mean, 1 senior IK plus 3 no-name IKs vs the leader of the Imperial Knights and his partner? Even junior IKs may be master level, but there's a variety within that and Draco and Ganner are different than a random Imperial Knight.
You've got three big gaps in your comparisons there, which is pretty insufficient to draw a conclusion.