Follow the path and under the archway (#1) and kill the next crazy minions. Head right and kill the reds there. Walk up the little hill, turn the wheel (#2) and grab the Red Minion Hive there. Carry it back to the Tower Heart. Crazy minions will be coming up from the ground all the time so kill them as they appear or they'll kill yours.
Take 10 reds from the spawning pit and come back through the hole to the path under the archway and head to the wheel you'll see in lava (#2). Send reds to turn it and go across the bridge and along the path. Turn right and take the blues with you across the water. More crazy minions will appear when you want to take the next hive so kill them and carry it back to the Tower Heart chamber and take the all-minion-kind commando.