How to farm the antimite mass?

[Revan]

I swear these random events for achievements are so annoying, any way to trigger it?

[Iggi]

This probably won't help you but a few things to note:

1 - Only spawns in Area 11 of the Oilwell Basin, make sure you have that discovered at least.

2 - You can also go to your map and look at the locations schedule to see when it spawns within that game day. Typically you want to wait, instead of rest as that starts a new day.

Good luck.