While I'm still grinding through BT2 picking up an occasional new pic, I also started doing a little work on the combat icons from Dominions 3. The base game uses png while the user artwork I've looked at comes in various different formats.
Each character, like FRUA, has two poses with a base of 64 pixels for human size and wide, tall and large versions. Cutting them down to 24 pixels makes a lot of them too blurry for FRUA, but some of them still look good. They would probably be great for DC
I've done 8 so far - below are 4 of them - a giant ant, a sundew, an elephant and a gelatinous cube that needs a little touch up. The sundew is human sized, the ant is wide, and the cube and elephant are large.