i suck at the campaign in this game...faction suggestion?

[Lemur]

I would recommend the Marathas. I'm a quarter-way into a campaign with them, and it's a good position. Two territories, with two easily snarfed within, one major opponent (the Mughals). Sure, you have to take Portugal's port, but they get over it (in my campaign by becoming dead). Yes, they're allied with the Brits, but the English don't really care, and will drop their war with you the first time you send them a tea set.

[Beskar]

I found winning the campaign with Marathas quite easy, that I did do. I did a massive blitz against the Mughals (kept heading into bankrupt with them blocking all my ports) then Mysore attacked me with a massive army in the south. So I sped up my assault against the Mughal which meant losing my army in the process as I didn't refuel between captures, then had to build up fast enough in the south to counter and destroy the Mysore.

Luckily, Portugal assaulted Mysore themselves, even though they lost, their army was destroyed, so was Mysore's, which lead me to a victory taking those areas, and the British didn't care about the whole thing.

Then for the take 50 odd turns, I turned India into a complete powerhouse getting 50,000 per turn income, being the most technological advanced nation (I bought the technology with my tons of wealth, plus my own university) and currently own Rupert's Land and Riga for staging posts in Europe and America.