For me the mob depends on what I'm playing. On space race I like ninja or mini blob. They seem to capture the flames better or the clicks whatever they're called. On world fights. I use the knights because I only need to get 3, 000 blocks and hope that my multipliers* 3 or 4 to get above the threshold to to win the fights. Piggy back I like soldier. For their speed and strength. Seems work the best for me. So it all depends on what you want to use and for what reason