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.
Depends on the weapon/frame in question. Some need more than others, and some builds are also far more expensive than others. For most prime frames and weapons which come with a preset polarity or two, I find 1-2 forma to be more than enough the majority of the time.