Must use at least a Level 15 Defense general
41,451 grunts
1 truck
1 slasher
1 sigbin
1 flickerform
1 AT
triple check the numbers because this has worked for a few of us flawlessly. I accidently sent 12 flickers one time and lost 10k grunts.
Tried it again after triple checking my numbers and voila..no losses.
NOTE#2: This method works if you don't wave it and only works for 5-6 times before shank adjusts and you start losing 7k grunts.