Bullet 2 is extremely inaccurate. Also somehow I had bullet tier 2, freeze tier 2, and mine (maybe tier 2), and it said "hybrid" and they became two freeze mines and I lost the bullets. Edit: It seems like bullets+freeze always becomes freeze mines.
Also, it seems like once your painting power gets high enough, it's enough to let you hang on for a long time and it's less clear why you actually lose.