themia

I'v made it to the point in the game where im attempting to free randy to get us off the space ship and im at the last stage and im about to battle the three aliens that are weak to electricity but all i have left is mana/revive potion and no HP so its almost impossible to get over it. Anyone else in a similar situation and know what to do or how to get health potions. I've searched the entire area and looted everything possible but i cant seem to find anything. Help? Ps. I have also modified by gear to the best of my ability to help myself but theres nothing more to do. I've even adjusted the difficulty options from 'normal' to 'casual'