I'm not familiar with the Omega and all there mounting options but typically 3 lug or a taper mount / lock system are the most secure. If you are going to use it on a rifle I'd look into the Taper mounts.
I use direct thread because it's the shortest attachment method but I'm not moving the suppressor around either.
Shoot it, warm it up, give it a good twist again to make sure it's tight and fire on.
One misconception I had when I started using suppressors is that they would be easy to take on/off, apart or move around to different platforms. The reality is different metals expand and contact at different temps add that with powder, grim and corrosion it can be a real pain in the ass to do any of that.