I have the full 1000, getting the territories can be difficult (possibly the easiest and most difficult at the same time). The way the game is set up, territories don't change hands easily enough. Without a full team to grind with, it will be so slow going you should just quit. Like the thread mentioned, if you find a team with all the territories already, it's an instant unlock with no work.
New equipment/parts are mostly unlocked by gaining team levels with everything unlocked at level 50. The ultimate weapons are unlocked by completing the story and order missions. All of those are pretty much a walk in the park.