Well, this Always War game mechanic looks promising. It surely brings a lot of drama and we might see some unexpected events (hope to see a lot of maps, including of regions you're not directly concerned about). I can see clearly the point in starting from the heel of the Italian boot
. You'lll be pretty safe progressing North against the minors and by the time you meet Milan, you'll already be bigger than them (provided they survive until that point, since their position is not as safe as yours).
For now you have to care about securing Sicily though, but I guess Aragon might not be as dangerous as they would be if this was the only war they'd have to fight. France and Castile might be busy themselves with their other neighbours, but they can still stomp Aragon like a cheap piece of meat between them (hope it will work and then they get doomed having to fight each other forever
).
I'll be pleased to see you expanding towards the Alps, crushing Switzerland and Austria - you know I don't like them, especially when they prey on Italy like they did in real history. I can't stand to see those rude Germans putting their thick fingers upon fine Carrara marble
... Make sure you hold Tyrol quickly, not only it's a mountainous stronghold, really difficult to size, but it's also quite rich - and a gate to Germany. I was glad to get it early in my game (Tyrol had been previously released from Austria, then they vassalized them, and I just had to annex them in a defensive war - I could make a separate peace since Austria was not even leader
).