(XB1)MarineDawg

Prefect stats...they will present themselves eventually.

Regardless of why but you rolled your Riven and have spent upwards of 40k Kuva chasing the lost roll's stats...imagine if there was a roll back feature, but it comes with a price. For one a few. Not nominal, say 10k Kuva but when rolling back it locks the mod so it can't get rolled again even if traded. Good idea, bad idea, thoughts?

Would the Stalker also be an exception? It's been awhile since I've done those quests but seems to be the case.

It's been a while since I have done this challenge but solo I have only completed once as Frost (two or three tries.) Chilling Globe helps but AOE weapons are a must. Lethal torrent Staticor FTW.

If your question concerns the Mods you don't have (as I am understanding,) try warframe builder. They should have the mods there and you can look at them in categories (melee, shotgun, et cetera.) Good luck.