My very own FMC romance scale:

(1/8) No romance at all, literally zero --- 

(2/8) Very little romance it's basically negligible --- 

(3/8) Some romance but it's not the focus (FMC is the focus still) --- 

(4/8) Equal parts romance to other aspects, but ML is nice so it's alright --- 

(4.5/8) Equal parts romance or ML appears as much as MC but MC is the dominant one/stronger than the ML ---

(5/8) Romance is a big portion of the story or the ML appears as much as the MC and it's not her own story anymore, more like their shared story --- 

(6/8) ML appears so much is the MC even still the protagonist at all?

(7/8) MC is smart but in front of the ML becomes a dumb dumb / MC is strong but in front of ML becomes a doormat - immediate dropping of the story --- 

(7.5/8) MC is strong but ML is stronger and she can't escape his grasp everytime - the imbalance makes me curse and swear --- 

(8/8) MC is totally useless without ML and always needs his saving. Why is she even the MC?

Of course this list won't include all of the above, just up to maybe 3 or 4/8 at most. I just wrote down the scale for my own use.