Instead of having 2 otys out to each creatures, you can also use an overdrive on one. Then if your opponent is going to live for a while after the oty gets to 1 hp, you just eat it, otherwise get that last attack in for some good dmg.
If your opponent has a lot of low hp guys, use the overdrive on the stronger oty, the one you were using to eat things with, so the overdrive works for a longer period.
Opponent has low hp? Use overdrive on the chargers to kill them quickly.