before i overdo it, what is considered a "normal" amount of forma to apply to weapons/frames? i main nidus and i can't see myself using 7 or 8 forma unless there is a really specific high cost build that is extremely efficient, but just curious what the average stopping point is, before i waste forma upgrading more than really necessary.
if i don't intend to use it, zero including potatoes (i usually consider these to be mastery fodder, though i usually don't destroy such weapons). if i like it, one or two at least to fill out all the slots well (these also get a potato). if i intend to use it a lot, as many as it needs to do what i want which is usually 5+. my sevagoth build has like... 13ish?+ normal forma and 3 umbral forma across his three moddable sections. HE IS A VERY HUNGRY BOY AND I LOVE HIM MUCH.
so, really, as much as you want to put in, really. unless i want a super specific build, i will usually opt to put in forma on the more common polarities (V aka madurai, and ~ aka naramon) instead of a rarer one (like D aka vazarin, or = aka zenurik) assuming i have two mods of the same cost but different polarities in a build. i do this so that if i change my mind about the build later, it's highly likely i can switch without needing to reforma the thing (the umbral mods make this REALLY annoying to achieve, though, cuz they're so expensive and so is their forma)