Thanks !
I used to play her in the toplane, but now I realised that she can be easily abused. She will lose against a bunch of all-in match ups like camille or garen, and can easily be dived. It's hard to play against bruisers in the toplane, and I think the only "free matchups" are tanks, but even then, they can easily set up a dive. So I think she's really not good in the toplane, as you can't really win lane against anything other than tank, and that all along the game you can get abused. I think if you want to play her in a solo lane, mid is a better option as you will also not take the place of a frontliner, and be able to escape ganks more easily, but overall adc/support is way better than top, and better than mid.

I don't use it that much now but when I wrote it, I used it a lot, because with resolve, your auto will grant healing with Font Of Life. I take resolve because when i'm going for a more supportive playstyle, i think it's better but yeah rest of the time you can take anything else as the secondary tree.