In my own experience, the new battle system doesn't lean on the same troops by province type like the old system. The most dramatic change I have seen is with the Steel provinces. On the old system, you could just keep punching the Light Range button, and with some Enlightened Light Ranges you could totally rule Steel. Forget that, Steel is practically where Light Range goes to die now. You used to always get some encounters without the thieves, no longer. Some of the troop recommendations out there are sometimes like a bait-and-switch sales experience. For now, I don't see that primary-secondary-tertiary troop recommendations by province work very well any longer. I am mostly just doing the sort of troop matching others have mentioned. Sure patterns can develop, and you can take advantage of those. But, an overall successful recommendation? Not so much.