原子暗黒殿 / Genshi Ankokuden - Hello Alice
Final stage of chapter 1.
This battle looks more intimidating than it actually is. Goliath dolls may have high health and attack, but they have no mobility, range and defense. Just strategically place your touhou and you will be fine. If you can't kill them, they will explode after a while.
The only thing you have to be careful are the shanghai and hourai dolls who can be quite intimidating in numbers. Just rush to Alice and you'll be fine.