For the MST setup you need to get 5+ deku nuts since the strat with ghoma clip will use exactly 5. Then you wont have any for the setup
No it doesn't need 5.
Deku Nut 1: Stun Skultulla at B1 Skip
Nut 2: Stun Gohma
Nut3: Stun Gohma after Crouchstab
Nut 4: Wrong Warp.
That's it.
The Clip method uses all 5:
1. Skulltulla at B1
2. Stun once
3. Stun twice
4. Stun third time
5. Stun after Clip
(6.) Wrong Warp
Edit:
Nevermind I didn't saw the Gohma clip in your post.
I'm assuming he isn't doing gohma clip, because he is using the other nut wrong warp.