Nicki has had a longer run that those women so her tree of influence is larger. She influenced more female rappers than all of them.
So what Missy influenced Wayne? Y'all take statements and flower giving from other rappers to other rappers way too serious. My man Nicki probably influenced Wayne too fr given the countless studio sessions they had together over the years. This doesn't mean shyt in the grand scheme of things. Nicki has the total package to be the G.O.A.T. and she's still going.
Speculation. Having a longer run doesn't mean this tree you speak of is larger. Especially since she is a branch off someone else's tree.
Know your history. Baby and them speak on how Wayne was listening to Missy in the Hot Boys days. Listen to "Tha Block Is Hot". How he's rapping on that song is Missy all day. Wayne ain't just recently randomly say Missy was his favorite rapper. He's on record saying this for decades.
Nicki isn't Wayne's favorite rapper. Until he says she is, then you can keep the speculation and juelzing. All you've done is "probably this" or "because she's been around x amount of years, she has more influence". Until you can show me proof, don't reply. And one of Nicki's biggest hits, "Anaconda", is a song Missy Elliott rejected. When Nicki dropped "Right Through Me", Babyband them were hyping it by comparing it to Lauryn Hill's work. Drake has a huge hit sampling Lauryn Hill and he sampled Missy.