If you run too far or skip areas in Nightfalls you can make champions despawn. If you make champions despawn it counts as not killing them and therefore you cannot get platinum. If you dont get platinum you do not get ANY nightfall rewards. No weapon, no cores, no prisms, no shards, NOTHING.
PLEASE STOP!!!!!
We are not playing these Nightfalls for the end of strike chest for 3 legendary shards. We are doing them for the WEAPONS.
Go into the opening of grasp. To go up one level it takes 140 kills. It takes 140 to extract deepsight resonance as well. Extracting a pattern it takes 120 kills.
Honestly you're wasting time running nightfalls on adept or hero as it is.
People are rushing through adept & hero for the reputation rank. They are never going to stop doing that. So either run those with 2 friends or you can do what I suggested in grasp of avarice.