IMHO, Mirage guys need to focus on using BVR for other means.
Take the bandits where YOU want them. For an Eagle, the bandits are where they need to be right from initial contact. For a Mirage, you've gotta simulate an F-16A to do anything.
So ditch your 530s, take more Magics, and go notch, offset, and meme your way into ACM.
Edit: Keule, didn't see that before I posted. On RCS, I'm pretty sure every fighter in game is 5m2 all aspects/elevations and loadouts. As for ground clutter, anything other than the original APG-63 should reject that pretty well. And as for BVR sorting with TWS...There are, in fact, ways around TWS sorts. ;)