seem a little too auspicious for the Romans. But for all Iskander's martial ability there looks to be a sizable quality disparity (if Guard Tagma>regular Tagma=Persian regulars>Persian auxiliaries is correct, and the Romans have a massive concentration of arguably the best troops in the world).
How are Iskander's subordinate commanders? For a massive battle of this scope they should be a lot more important and all the Romans seem to be top notch. Eagerly anticipating the next update
On the otherhand iskander is named after the king who won this battle. Maybe this time a persian alexander will march west. After all he is the Persian Andreas Nikitas and both Alexander and Andreas has both face worse odd than this.
Seems like the centralising trends of AoM are continuing in Western Europe, with some potentially very interesting geopolitical outcomes. While making predictions over the course of centuries is shoddy in any TL it does seem like both Germany and the Triunes are on the way to coalescing into fairly centralised nation states at least a century earlier than OTL. The specific borders however have some interesting implications. First of all, looking at the last map I can find from 1600 it appears like both the Triunes and Germans are lacking some of the key industrial territories in Lotharingia. Obviously these won't come into play for some time, but short of some major border shifts in Western Europe it looks like both the major players will be lacking that key territory. Nevertheless, if one could gain control over it it would become the undisputed hegemon of Western Europe.
To which region are you referring to? In 1612 they were both sitting on opposite side of the Rhine. The Triunes overrun the French part of Lotharingia some years before so they got Lorraine and Alsace. I got some doubts if Germans got the Ruhr, but I think Lotharingians are reduced to BENELUX plus Calais.