KJF is still my favorite method in AAR. Almost no one remembers how to thwart it, and even if they do, they almost have to get perfect dice to succeed. (By perfect I mean they win with the forces they expected to win with, not that they get all hits and the defender all misses.)
Naval battles, if not properly set up (and no sim I have used has been accurate in how they will turn out even Frood) can turn a game in the pacific dramatically. I think the problem with the sims is taking into account submarines and altered orders of loss, etc. Anyway, Japan really cannot afford a battle against the English navy, the American navy and marines and a few Russians at the same time. The trick is not letting Germany go insane and get into the 50 IPC range - something England and Russia can easily handle with conservative moves and normal dice results.
Back on topic, however, I like to set up the Canadian Shield because it does NOT negatively impact my original goals of Kill Russia First AND it puts the Allies in the position of trying to defend both North America and England. That’s the big thing. Your German Navy, Airforce and Armies are in position to invade England just as they are E. Canada! Likewise, the Japanese transports can easily land troops in Buryatia and send the 5th one out to collect from islands without any negative impact on your plans.
And to me, that’s always the best strategy. You force your allies to react to you while not being committed to any specific attack.