To get this cheevo and the other one listed below in about 5-10 minutes:
Play on multi-player this can be done with another pad or if you want to boost on-line with a friend just decide who is going first.
The person going for the cheevos first should take their strongest attacking special unit and no other special units, have 2 on the battlefield at the same time so just delete and make room for them to appear and keep calling reserves until you have 2. When you have 2, activate them at the same time and this makes a sure thing for the cheevo. This attack should amount to 200 at the least. The second player/pad deletes units on their side and then skips turns.
Use either of the 4 new characters: Azexez, Count Carlyle, Ludmilla or Azh-Rafir