(lol. Edited because I was looking at August instead of September when I made my recommendations.)
I'll do my best. You can PM me if you have more questions. Coming from the States, Ibiza can be more than overwhelming. You didn't ask about where to stay...so if you haven't booked do NOT do so in San Antonio. Trust me. Unless you're 19 and into keg stands. I suggest Ibiza town, Figueretas, or Playa d'en Bossa.
Sat: KM5. Nice to just sit back and relax after the massive flight from the States...and you'll need your energy for the next few days. Beautiful gardens. Music til 4. Dinner requries reservation. Can be spendy tho.
Sun: We Love @ Space. There's no other option. Get there no later than 4pm and buy the pass that gives you re-entry. You'll need it. The party goes for 22 hours.
Mon: Circo Locoa @ DC10. Sleep after Space for a few hours, then head over to DC10 around 4:30/5:00. The terrace closes at 11:00...main room around 2am. Carry on at Bora Bora if you dare.
Mon: If you have it in you...meaning you can still stand, Manumission @ Privilege. One of those Ibiza experiences you won't get anywhere else. The size of the club makes the visit worthwhile.
Tues: Armin van Buuren @ Amnesia if you're into Trance. Defected @ Pacha if you're into (commerical) House.
Wed: Purple Music @ Penelope w/ Jamie Lewis. Pure House musci. OR if you're up for Techno, I l-o-v-e Meganite @ Privilege.
Thurs: Yoshitoshi @ Pacha
Fri: Made in Italy @ Amnesia. Harder house. Club isn't as packed as Weds/Thurs so a good opp to see it and have room to dance.
Sat: Hed Kandi @ El Divino. Vocal House. People think it's cheesy, but I do love El Divino (everything but their sound system)...and if you're gonna go this is the best night to do it.
Before the clubs, head to the port in Ibiza town or Playa d'en Bossa for cheap eats & pre-drinks. Pick up passes there. Don't pay your entrance at the door. When at the port, head up to Dalt Vila (the wall enclosed town). Take pictures from the outer walls, and eat at one of the many amazing restaurants.
See a sunset from Cafe del Mar, Savannah, or Mambo in San Antonio. Also great lookout spots along the west coast.
Beaches: Cala Jondal, Bora Bora, Jockey Club in Salinas, Sa Trinxa. All have live DJs and good food.
Obviously everyone is going to have different opinions...but this will show you all the clubs and give you some diversification. Note I did not include Hip Hop because I hate it. And I purposefully left off all clubs/bars in San An, because I have no knowledge of those other than bad stereotypes.
Good luck.