Well actually JK could just stay on the defensive, let you wipe yourself against his stakes, then counterattack. The defender ALWAYS has the advantage.
Superweapons also will play a role.
Speaking of supers. Revised them based on popular demand.
-Gaia Device destroys armies, navies, air wings, industry
-Psionic Decimator destroys armies, navies, air wings, population
-Chaos Storm destroys armies, air wings, population, provinces
-Nukes destroy armies, air wings, industry, population. Immense power compensated by a) ability to build cleanup programs and b) the fact the fallout has a chance of spreading to the firing nation and killing population. Also may cause diplomatic fallout. /pun