Finally got around to having a proper look at your entry. I like it a lot! I think you really managed to create knights and seers that feel like they could be straight out of the book. Will definitely steal them for my home game in the future!
My only critique would probably be that too many of the abilities are focused on combat or spelled out in combat terms. For example, why not have the Gale Knight just conjure up a small gust of wind as a minor action? You could still specify "if used in conjecture with thrown weapons, those get +d6" or something. But then it would still see use outside of combat as a narrative tool as well. Just a thought though, as stated before, I still really like your entry overall. :)

Note:
The Shard Knight's and Flail Knight's abilities are both called "Overhead". I guess the Shard Knight's ability should have another name? There's also some minor spelling mistakes here and there but I think every entry has those.