They're not unless you've forgotten the content of the thread. Barring Xander, you'd agree with my power rankings?
* Fred v.s. Xander: I maintain that AtS s1-s4 could be because of Jasmine. But could Xander have survived 5 years in Pylea? In addition, Fred was regularly patrolling with the Fang Gang and I don't recall many times she's considered a liability or a detriment. Fred never had to have a "The Zeppo" (B 3.13)-type episode.
* Andrew Wells vs. Xander: AtS S5, BtVS S8, BtVS S9, etc. Andrew in BtVS S6 could summon demons. Overall, his power ranking is above Xander's.
* Oz is a werewolf and even Xander placed himself below Oz.
* Anya, I'd obviously use her vengeance demon form when placing her above Xander.
* Cordelia: Have you not seen AtS? Half-demon Cordy was arguably more powerful than Buffy. Cordy became a higher power. Even human Cordy became a better fighter than Xander.
* Billy the Vampire Slayer: Are you joking? Why wouldn't he place above Xander?
You're being silly by including those like Anya, Cordelia, and Billy as those who should rank below Xander.Could your character bias be at work here?
* Given BtVS S9, I consider Dawn the Key who is simply 'formed' to look like Dawn. If I remember correctly, you consider Season 10 and Season 11 canon, and Dawn at some point has incredible superpowers.