The River Song story arc is pretty big:
It took a while, but I finally re-watched all those episodes in the above order.
I should say, the first three episodes above actually have River at multiple points in her own timeline. So those episodes feel less like you are walking through her life alongside her. But after those first few, the timeline becomes a lot more linear.
The River Song stories were built around Matt Smith’s Doctor, so the first three-quarters of the timeline is one big story arc. And it’s a good one. Things start to get somber around the episode The Husbands of River Song. No spoilers, but the last quarter of the timeline had a lot more impact for me when I watched them from her perspective.
After watching them all again, I don’t think the last episode really needs to be on the list. The second-to-last episode is really the conclusion of the River story arc. And the last episode only kind of has her in it anyway. So I marked it as optional.
In the end, I really enjoyed watching the episodes in this order. It added an extra dimension to the them and gave a little depth to the characters. This was a marvelous experiment. I’m glad I did it. And I’m glad I did it with my best friend.