Free Mode Caucasus.
Like the title says it's free mode where you can use any flyable aircraft and just fly around or spawn AG and AA targets ranging from easy to hard and it has PVP with BVR and dogfighting slots. This is the kind of thing that I think should be in DCS by default to allow people to just jump in with their friends and avoiding the hassle of having to go in the mission editor while your friends wait making this "plug and play". This mission is also really light on your computer.
You can join my Discord https://discordapp.com/invite/vdse9zxif
you are interested in flying with me or my buddies or if you want to learn anything in DCS since I have almost all modern modules (btw it's not a DCS only Discord). I also post there the changes I make to Free Mode and you can report bugs or make suggestions for it also in my Discord if you want to make sure I get to it since I don't get notifications from here. Anybody is welcome there.