[Taqwus]

Vectoring... yes, would be nice. Thought it'd be easy at first, but then realized I was ignoring supply and similar issues.

Hm. It's theoretically easy in the basic case, but if we start throwing in constraints like "don't choose routes that cause starvation because multiple groups chose the same intervening province", it gets harder to optimize. Not only do different groups of commanders and their troops move at different speeds in different areas of the map, and they only impact supply when they're actually in a specific node.

Relax that constraint, work more on a capable UI for it than multiple-simultaneous-pathing (so that it shows the routes that the armies would take and when they'll arrive, and lets the user adjust the waypoints if the thinks that there'll be supply problems, an excessively tasty target for an army-blasting spell, or a move through a province that seems to have a hidden unit-hurting site) and maybe it's doable).