Honestly, I think whatever Tier 1 you're able to snag is the one you're able to get. MMRR isn't open yet, but the other two frequently have standbys of 2 hours+ during peak times.
You'll have a better shot, theoretically, of getting a better selection of FPs if you schedule HS towards the end (Rather than the beginning) of your trip. But the reality of that is that EVERYONE is trying to get those FPs, so it really isn't a matter of "which one you'd prefer at X time" as it is what is still available when your FP+ window opens up.
FWIW, and this is JMO, I don't think the MMRR madness will die down anytime soon. SDD and MFSR are popular rides, and MMRR doesn't have a height restriction=very family friendly.