My thoughts for solo 3 stars:
- Deliver carriables is annoying because the field crates are always so scattered around the field depot, last time I did it on the outskirts of Spaceport to avoid meeting other players, and was lucky I found two next to one another, otherwise I wouldn't have had the time to extract because you spend most of the round running around. Use a map from https://arcraidershub.com/maps/ or https://metaforge.app/arc-raiders/map.
- Damage Rocketeers is self explanatory, start from afar, bring grenades or Hullcracker. I would rather do this in squads though.
- Destroy Pops, Stella Montis if you end up in a friendly lobby, or Buried City moving between Hospital, Space Travel, and Research and give them time to respawn.
- Bunker I've never bothered, but I believe people tend to cooperate for this, last time this was a trial, I was vids and pics of people waiting in line to complete the event.
- Damage Hornets is self explanatory as well, remember to bring enough ammo or grenades.