1:Based on the information provided, the spawner placement needs more work. Generally, there should be more common spawners than rare ones, and the placement should make sense, with common ones easily accessible and rare ones in out-of-the-way places.

2:Without any information provided on spawners, it's impossible to tell whether the spawners are done well.

3:Based on the information provided, the spawner placement makes logical sense and seems to work well.

5:Based on the information provided, the spawner placement makes logical sense, works well, and sounds really well-thought-out. Yay!