Dammit. I agree, too. Though I am tempted to put Rahvin & Sammael a notch below Ba'althamel & Be'lal. I would attribute the apparent cooperation of the first two men released to their being close in strength. A guy that far below Aginor & so physically ruined would be too tempting as prey, for Aginor, who strikes me as more the "vulture eliminating the weak" than any sort of combatant on equal terms. I think Eben's superior performance against Aran'gar is indicative of his growth since Sammael dominated him & his buddies in Illian.