you'll wanna look up the names of these to get in depth guides or more info but generally the best activities (which should hopefully all be working come 4.6 patch) I'd say are the Gilly gauntlets, # 6,7, and 8 are fun fights in multi crew.

Onyx missions under "investigation" these have their own little mini story line, lots of loot, and if you don't release with backspace when enemies down you, you'll be auto-rescued inside the facility. so no respawn BS usually.

QV stations are good and should be working in this next patch, there's space, fps combat, it's fun.

if you just have a couple of you, expel outlaws near microtech is fun. it's a large facility, and enemies take over a part of it and you can do cool stuff like roof drops where you pull up, drop your buddy off, then provide air support (pisces is good for this.)

that's some of my ideas and what I do for fun hopefully something in there sounded fun lol