I didn't have MM access but went on a MM (hey, don't judge, I didn't have a choice

). I passed through the turnstiles at 7:40 a.m. and waited with the ST crowd on the Main Street sidewalk. The ST crowd is kinda mixed (standby's and FPs), as camousketeer stated. There was a CM on hand on Main Street if you want to ask to be sure that this is still the case while you're standing there waiting (I didn't ask but should have). Walking at a New York pace, I got my ST FPs at 8:11 a.m., and my return time was 10:15 a.m. There were CMs at the kiosks to expedite, so the FP line moves quickly. I would have gotten to the ST FP kiosks earlier if I trusted that the ST FP kiosks are STILL at BLAB; not ST. So walk briskly to BLAB and look for the ST FP signs there. It helps if you get ST FPs as a solo traveler (as you will weave in and out of the crowd, families with strollers, etc.).
On the FP subject, I'd say that ST, Splash and Indy can have some pretty late return times if you get them too late in the day (with ST selling out early). I got Splash FPs one day at 3ish, and the return time was 7:55 p.m; ugh. Being wet and cold at night is not ideal...but! I bought dollar store ponchos, so it worked out. The Indy FP line was a zoo at 12:00 p.m. one day when I was there, but the return time was 1:30 p.m. The previous day, I went late to get Indy FPs at 5:47 p.m., and the return time was 10:20 p.m.--not the time you want to be at Indy, between Fantasmic showings.
For reference, I got SM FPs at 10:47 one morning and had a return time of 11:25 a.m. My family had ridden SM the day before and wanted to go the next day. We slept in that morning. We never got to ride SM that day because it broke down the three times we came back to ride it.
The point that I'm trying to make is, even if you get ST FPs by 8:15 a.m., you may still have a return time of 2 hours. This was my case on a MM for which I didn't have access. If you get SM FPs around 10:45 a.m., you might just have a return time of 40 minutes (this was on a non-MM). Indy, later in the day, is an hour and a half (if you were to go at noon, for example). My personal advice is, get ST FPs FIRST.
My personal FP order would be: ST, SM, Indy, Splash, BTMRR and Autopia. You can get RR anytime because the kiosks are disconnected from the rest of the FP network (but the family members I know who rode it said it was weird). Other DISers might say to get ST, SM, Splash, Indy, BTMRR and Autopia, probably because you don't want to be wet without a poncho in the cooler California evening. But Indy is so awesome. If you have small kids with you, then yes, follow the DISers' FP order since they may not be able to ride Indy bc of height restrictions, and the priority would be to accommodate them first. Rider Switch/FP lines takes a while at Indy, too.
You don't "need" to get SM FPs first thing in the morning, but you do "need" to get ST FPs in the morning. You can get SM FPs after ST.