that's pretty good here are some tips,
-reduce the blood ( by making every blood blueprints destroy itself IF a coin flip shows head with prob 0.4 )
-round the stamina amount by 0.05 { for any actor do that:
repeat every 0.0167 seconds modify $stamina to ( round( $stamina * 20 ) ) : 20 }
good luck on your project also :]