TT, without a doubt. You can get FEA, but nowhere near as easy.
You also don't need a FP+ for FEA anyway. They don't give out FP+ for that ride until 11am. So from 9am to 11am, it's 100% standby riders going through. If you show up before 10am, you will wait less than 15 minutes. A week ago, we got there at 9:45am and literally waited 3 minutes (including the time it took to walk through the queue ropes). I timed it.