yes while hermione would still be on voldemorts list and probably quite high she would not rank the same as harry or dumbledore. i would go as far as saying harry holds the number 1 place alone and dumbledore is second. but if they all split off from harry the only one whose position would not change is dumbledore so what your trying to say is in fact rong but we get the general idea that there going to be together. but voldemort would only bother about them when he has got many other people out of the way and it is infact harry that draws voldemort's gaze on them as he just won't die.