How do I beat the Stage Battle in the Dry Ice Mines?

What i did was summon 4 head banger units and a few razor girls,double team with the razor girls a snipe them while the head bangers take the brunt of the attack then just keep summoning more units and upgrade the stage when you can.

When the battle starts, upgrade your stage, then spend the rest of your fans on headbangers and razor girls. Then go around and turn all the fan geysers into merch booths. Make sure you use the battle cry solo to power them up to make it faster. Use all your other solos also as often as possible. As you collect fans, spend them on upgrading your stage. Once your stage gets to level 3, upgrade your headbangers and razor girls by scrolling over them in the recruit menu and hitting triangle. Now, build a huge army of headbangers and razor girls, then go across the field and make them attack her stage. While theyre doing that, get close to the stage and use the bring it on home solo and the face melter solo to help hurt the stage and any enemies that are too close.

I used the Bring It On Home solo to kill her troops when they tried to destroy my Merch Booth. Then I sent a few Metal Beasts, Roadies and Headbangers to attack her stage before she could call reinforcements. The stage crumbled in no time, probably because of the Roadies.

I spent almost an hour on this! I got one fan geyser but when I tried to get the other one, the drowning doom kept attacking my other one! I quit and when I went back on here's what I did: I got lot's of units, got the fan geyser on the right and all the drowning doom units were capturing the other fan geyser so I charged their stage while no one was there! I got it really quickly. Just go for it.