I have run a few hours of the Omnia conjuntion surival fissures and sometimes(more often than not) when in a squad of 4 it seems like only a couple of reactants drop per minute in these endless missions, across the entire map. This means that in the very last minute of the round, everyone is scrambling to find the last one or 2 reactant and a lot of the time nobody gets anything. This never happens when playing solo. When solo, I get all 10 reactant within the first 2 minutes of each round. We can try to all be in the same room for the entire mission and not kill anything, but not killing anything doesn't help. I played as dante with overguard and face-tanked everything, waiting and not killing anything at all and the spawns were not corrupting. How are we supposed to play these things? Do we just keep running away from all of the enemies until you hear the sound of the corruption? Also note that killing a room full of corrupted enemies doesn't guarantee reactant either, because that happens most of the time as well.
Is reactant time-gated or something and if the only way to get 10 reactant is to have 4 people in the same room together, what is the point of having these missions in massive tilesets? In endless survival missions, there is no point in keeping the players from getting the reactant as early as possible...it isn't like we can finish the mission any faster.