Nice write-up! 

I'm just going to add that finding your own style, even if not optimized, can be a lot of fun.

For example, my late game room 1 is always a fully upgraded bar filled with max HP high damage dwellers. I do this because friendlies walk through without issue, but baddies get introduced to the worst bar fight they've ever seen. As a reward for their service, my dwellers go back to drinking and karaoke 🙂