I can see Odin/Behemoth just fine and my rig only ran me $900, course even when i played on ps3 I was able to see Odin/Behemoth just fine, after the render priority patch, course my character sprite would stop animating, but that was hardware issue, not SE.

Also upping sprite limit wouldn't fix the issue except on those $3000+ rigs, if you set sprite limit to unlimited on a machine that can't handle it, your game will freeze or crash. SE said they upped render priority for marks, only thing I can guess is they didn't increase the priority enough, I'd say set it to less than party members, more than player characters.