Marpat desert and multicam . I don't have too much variation
. Planning on picking up some m81 in the future.
Cheat rig wise, I'd go either MC or coyote, mainly because you can get a good reel steal cheat rig on a budget in those colors. Only gear company I know of that does atacs is Mayflower (specifically chest rigs, but I don't look around for atacs.). Tactical tailor and skd rigs are relatively cheap.
Mixing camos is pretty common, It doesn't look that bad, and the key to building a good looking kit is building one that works. I run mc over other paterns because I don't care that much, and as long as its functional, I'm happy.
I know Airsoft society has a thread for matching gear to uniform stickied in their gear section, check that out.
Sorry if my post is a little jumbled, Pretty tired and on a phone.