Moving Through Multiple Provinces

[MaxWilson]

By the time your empire is big enough for logistics to become onerous, it's probably better to build troops in "factories" on the back lines and Gateway/Stygian Paths/Forest Trod them to the front lines. (Or else just build troops in front-line castles.) If you have cap-only mages that you need to shuffle to the front lines, they are probably too scarce and valuable for you to let an AI handle their transit anyway.

-Max