How do you think the tiers will be set up for SWGE? And how long a trip will one need to make fast passes for both SW rides, SDD, Toy Story Mania, Rockin Roller Coaster and the Mickey and Minnie train ride?
There's a better way to do this.
I'd see what the two rides look like before you go making FP+. Remember Na'Vi River Journey? Not worth it.. Also, who's to say that TSM won't move down to a Tier 2 once this all opens?
With SWGE opening, it's gonna be insanely crowded at the park. Heck, it was insanely crowded when TSL opened, which led to much longer wait times than we're accustomed to.
I'd say you'll need two days at DHS. One day you'll get a FP+ for one SW ride. On this day you'll go for Rope Drop and head to SDD. Grin and bear the 45 to 60-minute wait/hope that everyone runs to SW:GE. If you can get a FP+ for SW1, RnR, and another ride for this day, I'd say that's a win. Look to book it later in your trip. Keep the 13-day window in mind. The later in your trip you book, the higher the chance you'll get it.
On the second day, I'd either shoot for SW2 or Mickey and Minnie Train Ride.
The thing is, SW:GE is gonna bring in crowds like you've never seen, but a lot of these people won't be Disney fans. It's gonna be a lot of first timers who don't know the ins and outs of FP+...or even understand the system itself.