1)Try to keep Munch in an area where not many enemies are, and try to
use Abe a lot.  Use Munch as a last resort and try to keep Munch next to
a resurrection pad (the one with the blue egg when one of them are
dead). 
2)To save a lot of running around, carry Munch with Abe.  If you find an
enemy while you're carrying a mudokon, then put him down and tell him to
"Go beat 'em up" and help him.
3)If you're rescuing scrubs, then first take out all the enemies and
then go to the scrubs and rescue them.  If you encounter any enemies
with scrubs following you, then tell the scrubs to get the enemy because
they won't attack unless you tell them to.