1)Where do you want to play?
2)Do you play just historic or random?
1) All DLCs add a few focus tree so if you want to play in a certain area getting the DLC for nearby countries really helps making the map more alive.
Personally I really like waking the tiger (. Makes China interesting), dishonor ( makes central Europe weird) and resistance (makes Spain, Portugal and France cooler. Also has spies)
2) for historic approach waking the tiger and resistance feel furcal for the WWII feeling.
for random focus each DLC will revamp that area. So the more DLC will have the weirder the war/map can go.
Personally i Agree with most of what
Thalanil said.
My exceptions are:
-
Man the Guns -> I think Navy editing is super important if you are playing a major (water) power or playing in MP with friends. Being able to costumize your navy more allows you to choose between having these super powerful ships or very bare bones. For example if i am playing as France while a friend plays as UK allows me to have a weak but numerous fleet that mostly exists to pin enemy fleets until his impressive battleships or carriers join the fight.
- Together for Victory -> I don't find the mechanics to control puppets very compelling at least when compared to other paradox games like crusader kings or stellaris. I do like that this DLC adds lots of variety to a run. You see india, south africa and australia are still relatively lonely in their places. This measn that if they move away from allies it can create some cool approach. For example india joining Japan makes for a great major power right there.
