Basically stack something at the start, you can use Hermit/C. Gross, however for this run I use Pizza Cat just because a stack of Pizza Cat demolishes SBK. However note you should really be careful how you approach the base when stacking units, by using fast units when you start the boss phase, you can make Tackey attack pretty early and kill your stacked units. Waterblast is very good here in chipping the Super Metal Hippoe, while Waitress and Hurricat are good as your main crit units here. Moneko and C. Moneko are mainly just for the combo.
Mohawk +50
Manic Eraser 30
Eraser +48
Bombercat 30
Pizza Cat 30+2
C. Moneko 30
Moneko 40
Hurricat 31
Waitress 30
Bahamut 30
Waterblast 15