Sorry for the offtopic, I am upset of people showin off "his skills" on a game, using superior aircraft.
Well, The Mirage 2000 seems to be a very good figther and of course a great addition to the only "west" fighter we have now, I suggest to fly it in pairs using its radar and to do not relay complety on BVR, its radar seems to be great for shooting at short distances, 20km, so in my opinion this one needs to be used as an interceptor as it is, ambushing and relaying in some short BVR.
I am used to Mig 21, and for taking out a target, often I wait till it is at 10km, and more times on short distances, with Mirage, I hope to take targets on BVR and I think it will be effective.
Opinion:
Good maneuverability
Good weaponry (The 530D will be a good choice against Aim-7 or R27R) or at least can compete
Good range (unlike Mig 21)
Good AG weaponry, I think you can carry 2 530D and some AG ordenance, you can self-protect you
Air refueling, this is very fun! and in servers like 104 can add more inmersion
Good Radar, Unlike Mig 21 this looks like to be more FC3 in style of being effective, and not loosing contacts