You can get 10/10. The key is to alternate the targets for now (this is like a normal difficulty scene). It's 3 in stage 1, 4 in stage 2 and 3 in stage 3 iirc. All using any hand action, on her thigh/ right cheek, left cheek, and back. The threshold are over 300 and 500 climax iirc.
I'll have to check Raphy's scene cuz I don't remember all of hers.
I tried many times the highest I can get is 9/10. Then in my one (typical) playthrough I made the following observation:
Stage 1: Alternate between thigh & right cheek get my 1st TU (target unlocked) around 300 climax. Immediately a following click on left cheek I got the 2nd TU. I got my 3rd TU around 400 climax at a thigh click (not sure if you need alternate actions between thigh & cheeks for this).
Stage 2: 100 CB (climax boost) at the very 1st click on back. Then a 50 CB on a click at the thigh around 500 climax (again, not sure whether alternate actions are needed), and a 100 CB followed by a click on left cheek immediately after.
Stage 3: A TU at the 1st click on back. 50 CB occurs on a click at thigh around 300, and another 50 CB by a click on left cheek immediately after, then a TU by a next click on right cheek.
Moreover, at each stage when I got everything mentioned above I always let the climax points drop back below 100 several times to try other combinations. Nothing else happen.
What am I missing here???