You need to do your own testing to find the dose that suits you best - Your own body chemistry and individual social factors come into play here, so we can’t say how much.
If you check back to your intro thread, you will find the Sweet Spot guide already linked.
Where is a different matter - Have a look at this thread for plenty of ideas:
But don’t get too caught-up with app points - So long as it has good circulation (warmth) and is open to the air to diffuse, all is good. 
Saying that, 30+ women tend to respond to a more robust dose compared to younger women, so the 2x Ammo is a good start and yes, in more raunchy environments, clubs and the like, you can use TUTH very effectively alongside it. More mature women tend to find a larger/more overt Androstenone dose with less comforting molecules more acceptable, you still need to go easier in work/polite social environments though, or you can get taken for a walking hardon - which is often not the best attraction strategy.
If you are thinking on P75, it would be a good one to bolster Summer Ammo, which can be a bit weak for folk our age. Get the 2.5mcg dose and start from there, I rarely need to go above 5mcg with Androstenone or 7.5-10mcg with Socials even at my age.
Another one to consider for clubs at our age is A314/TUTH - A good, no-nonsense and mature status/sexual combo that benefits from going a bit OTT on the A314!