I dont know on the game but....
For real,
If you want to avoid being spotted for real it is NOE, low level and tactical flying. Cover to cover. Only fire when you can hit the priority target and unless you are fired at don't fire your flares it tells them where you are!
Tactical flying think backdrop, is your hover kicking up dust, shoot and scoot. If they are searching for you on IR well you are screwed.
If you get spotted...
turn into your attacker, you'll never out run him/her (he is a plank wing loser :P), combine your speed with theirs for a head on and jink. They should lose you in the turn unless they have a padlock feature which is a great help.
Best bet if their are mud movers about is get into a friendly GBAD area and get the A10 smashed by your own air defence...fighters or SAMs.
Firing on them is a nice idea to put them off but I would suggest your chances are somewhat slim...but never say never.
However this is real world stuff.
I have just bought a new laptop to play ka50 so hopefully I'll see some of you online in a few days.