Re: Which is better, Knight or Serpent Cataphract
 

I think you end up with spiders commanders from Machaka's knights. I know I have
charmed some when fighting against them, but it may be because of a Charm quirk,
i.e. not working as designed.

Re: Which is better, Knight or Serpent Cataphract
 

Your wish is half granted. Well, less then 10% by mass...

Re: Which is better, Knight or Serpent Cataphract
 

Well, on the issue of the serpent + rider not being cold-blooded, please note that the rider him/herself is a significant-and probably sufficient-heat source. I've had some experience with snakes and they don't need to be inside an oven to be relatively comfortable.

Cold-blooded reptiles probably should get at minimum a 25% poison resistance, across the board, because of their slow metabolisms and generally extreme toughness. Not to mention that they've, as a species, been around for so many millions of years, that they're bound to have some immunity to anything natural.