Once you get to the later levels, the best tactic is to always click the green’s never a neutral. Always go for the biggest circles, b/c the greens will always waste their points throwing them all at a useless neutral, leaving the biggest nano’s vulnerable to even mediocre attacks. From there you can gain the lead in points, obviously allowing yourself to beat the level. Hope that helps to anyone having trouble. 4/5 no save
AFTer doing this i beat level 12 in one try