Tips for Aragon

[EmperorUesugi]

I use the Idea Variation mod. My first idea group as default is Maritime. Should I keep it or change or Dynastic? Second Idea group is Mercenary, no brainer as I must have near full strength army force limit at all times to keep vassals in line. Third idea group is Economic. Fourth should be either of Maritime or Dynastic, fifth one is General Staff, sixth Humanist or Religious?

 

[Oahkoah]

If the wedding happens then you're able to give Castille quite a few additional provinces and still form Spain diplomatically for free cores. If you're wanting to rule the med then feed Castille north Africa. I prefer to give Castille all of Portugal before they colonise, so that I rule the new world and the trade of the world.
You may want to support loyalists on Castille from the get go, can't let the relationship get too low if you have hungry rivals.

 

[yyrkroon]

Portugal is a pain. It is hard to arrange CBs on them in the early stages of the game, they tend to have at least one decent strength ally shielding them also, and they are just big enough that it will take 2 or 3 wars to fully consume.

 

[Viperswhip]

Yes, do the PU method mentioned by ElGranCapitan. If France has not rivaled Castile, I would ally them as well. Feed them Portugal, and await the Inheritance, once they have the Inheritance you can eat them at your leisure via the same button Castile gets, by this time you should have conquered pretty much the entire Genoan trade node.