Lower the minimum shading rate, increase the pixel samples and raytrace bounces (if using it) and reduce the bucket size from its default. Depth of field will help, but it'll probably increase your render times dramatically, expecially if you're pushing Firefly to do a better render. I have yet to try pushing the sliders all the way for a render; I like to do stuff other than render on the computer. I'm almost afraid to think of how long some of my several hour long renders would've taken had I pushed things farther. I've been patient enough with some renders, but I don't think I could sit through several days to get a render done, which I imagine would be the case with maxed settings, depending on what you have in the scene. Then again, there may be a point where there's no noticable difference with higher settings and it's just overkill to let Poser chew on a render with that much.

Cool render and armor, can't remember his name but it has a Greek god kind of feel to it.

Very good action pic!