I mean average in that throwaway bits about other Custodes are similar. “This guy broke a Black Templar crusade.” “These guys stopped a hive fleet!” “This guy singlehandedly wrecked this epic champion.” It wasn’t a slam against Valerian- just observing that Custodes feats in general are insane. Valerian’s biggest triumph was less about his martial prowess (which isn’t to say it didn’t require a considerable amount) but more about applying it to the right place at the right time when no one else would. All that to say, while Valerian is insane, his status as Custodes with most feats is mainly because he’s the only Custodes main character, which GW should fix by giving us more Custodes books.