She will most likely be a jungler based on how her Q targetting works + the fact that her item build for unlocking all 3 evolves is not something you can get away with in bot lane, she also wont really have much actual trading power vs most other adc and most importantly will have trouble with wave control given the nature of Q.
She is an marksmen but not in the traditional sense of one, to me its like they took pre rework eve removed perma invisibility with temp invis fused into E took Q increased its CD but also increased its total damage with W being good raw damage / catchup tool once they blow their flash or whatever you follow up with R and gain a decent shield and kill em.
i like How she plays is so much like pre rework eve which i dig because that was my favorite champion before they ruined her.
i see her core being gunblade + nashors definitely with starting jungle item depending on which evolve you want to unlock first blood razer + nashors for E evolve, ludens smite + gunblade for W evolve, or warrior smite + gunblade to unlock Q evolve. From here you fill in the gaps for your next evolve depending on what you need.
General rule of thumb will likely look like this Q evolve vs champs that like to invade, W evolve if everyone is tower hugging for some tower harass, E evolve for some early invade aggression / gank potential.
Still testing out the runes on pbe however its looking like precision primary + sorc/inspiration so far.