i see lots of lane commments so heres a jg one.
Never buy devorer. it may seem good but its not. had 100 stacks on it once, totally useless, was carried by team.
Shes incredibly mana starved, so be careful who you give blue too. I would only give it to mid if they are either in a close matchup or wining by a slim margine, and use mana. so a 1-0 leblanc.
you fail at ganking pre 6, dont even waste time trying, hard farm up to the point you can and try to gank immediatly after you get 6. balancing this out is her clear times, some of the fastest in the game thanks to her passive and huge amount of aoe.
if your team is loosing in lane id get a chilling smite for stronger ganking potential, and a trailblazer if your team is winning. if its running even its up to you, pick whichever you would rather do, blue for ganks, purple for farm. Rush magus enchant, good amount of ap for passive and cdr for your q/w.
spell order i like to use is w-q-w-q-e-r then just r>q>w>e. You dont need e until you start ganking, which isnt happening until 6 anyway, better to up your early damage with the shields and skillshot.
after magus enchant your itemization is totally game specific. in a farm heavy game you may want a
next, while ganking you would go for a
. Diana is, to me at least, naturally a bit of a bruiser/assasin, so full ap builds work just as well as building ap tank. offensive options are
and
, while some ap tank possiblilities are
Sometimes i have bought straight up tank items, but i would advise getting mana with those if you do opt for that path, as once again, diana is super mana starved
. boots are negotiable to me too->
all have times they can be usefull.