@Jahid Feliciano some missions like conjunction increase the amount of special enemies like thrax based on number of squadmates, which is more reward. Soloing will lower the farming efficiency too much bro. Guess it is gambling anyways.
I went on a fissure survival with random guys, at 20 min they decided to leave but I chose to stay. After the countdown, host migration happened and it forced me to leave with no rewards whatsoever, even my relics that were opened are lost.
Is there any ways to get it back, once I got disconnected due to my local electricity shutdown, but somehow I managed to get back my (only) prime parts that I opened (not what I chose) via ingame Inbox (Ordis sent me).