my top favs in RWBY are Blake, Ruby and Pyrrha {R.I.P?} also have you played the RWBY: Grimm Eclipse game? and you do know if i'm not mistaken 17 is a first year student in the advanced hunter schools I think it's 12-16/17 {Pending on birthday} Vale's Signal and the other 4 kingdoms equal to it for the hunter prep schools and then 17-21 for the advanced schools like Shade, Haven, Beacon, and Atlas academies {They would equal the real worlds highschool/collage levels if I remember correctly} lol so just tone it down from being Atlas Specialist/veteran hunter level to a more just starting to branch out from what they was focused on as I don't think a 17 year old would be a master of daggers as that would take a lot longer then less then half a decade to master, also I think you're trying to be alittle to perfect with the agile brute 'skill' also as the only 'agile brutes' I've seen have been in the dragon ball series and the closest you get in RWBY is Nora and she's....an oddball ^^' everyone else shown has been brutes like yang who's semblance let's them for a time to power up with each hit or like Ren, Blake and Ruby who uses either pure speed or agility to figiht