Hi guys,i wanna tell u about tanky building (hp) for Diana.
I will edit sometimes this build and add video with my quadra kill (with this build).
Why tanky? Becouse Diana - perfectly can start a fight with "W".
With build need realy nice farming, but it not a problem for Diana.
With ROA u can easy kill all creeps with only Q, and at this moment harrasing enemy like a holy OP.

Diana realy strong champion, and she dont need spellvamp bcs she realy good in tanky build.
All what u must do - harrasing enemy with Q, and when he got 400~600 hp u can just Q,Flashing,W,E,Ignite and First Blood ALWAYS YOUR. If u buy ROA and Giants Belt u can easy dive and start fighting 1vs2~3. All what u must do if u start a fight - Q.W.E.Q and u get all kills.

Realy? I dont know, i play like 40 games with Diana, on top and midlane, but nope, all games was easy. In all this games i have a score like 8/0/5, 25/2/18, 21/3/5 (i add screenshots soon + video)
For sure, Diana easy stay with Annie,Swain,Kassadin,Olaf,Jarvan,AP yi, e.t.c.
If i find a realy hard enemy for Diana - i will write here (of u can say it in post).

I will add more and more informations with picters and video. So GL and HF with Daria.
Try my build, and tell what u think about that. Thx, BB ^^