Depends on your experience with it. If you are experienced, then just drop 200mg with a 100/150mg re-dose later in the night (1.5 hrs later). You will roll absolute tits for about 5/6 hours.
However, if you are new to MDMA, I would suggest dropping 130-150mg as a starter dose with a 100mg re-dose.
Do not listen to anyone that says you need anything above 200mg, they're wrong.
I wouldn't say they are "wrong", just different to yourself. For example, I take 180-200mg initially because It gets a really good roll going, andI enjoy that slap in the face. Anything less, and it isn't satisfying. Some people just require higher doses than others, it doesn't make them wrong.
Put it into context... This is a female first time MDMA-user, not a heavy MDMA head searching for the best buzz. Sure if you're experienced and like high doses then 200mg is cool, but certainly shouldn't be endorsed to a first-timer. 100-150mg can even be overwhelming for a newbie, I've seen it firsthand.
I probably sound really stupid, but how am i supposed to guess who much 100mg is?!
Like I said, more is not better with MDMA.