I was in the Discord last week and Bell from DMM told me that the 30 AP missions are plenty enough for the Weapon drops, so you don't need to do the 50 ones at all unless they're easy and/or you're just trying to get all the drops you can.
It's weird though that you're not getting anybody coming in to support though, I've never seen that happen no matter what time of day it is. Only thing I can suggest there is to update your friends list with more active players and/or join a stronger Union maybe. Today is heavy for Raid farming though, people might just be soloing a lot to prepare for the Event tonight.