@Colge thanks for the info i will correct that. but i still think she can go beefy AD.
@cazbah the reason i dont max stun first is because i get cdr and i personally love he extra armor and mr. and thx for item tips i will try that.

I don't agree with your skill build. You want to get stun, shield, blade in that order for the first three levels. This will increase your damage output and that stun is invaluable for first blood.
I really like the idea of Yoms though and haven't really looked into that as an option for AD Leona.
Never build bloodthirster and Trinity Force before phantom dancer, as they are both very expensive items. I suggest building phantom dancer, infinity edge, bloodthirster then trinity force. Just an idea give it a go :)

Try to avoid saying 'XD' it makes you look like a child.

Good build otherwise.

You said her passive gives you extra damage so she can be an AD. This is not true man.. The sunlight that gives extra damage is only for your allies. You cant consume the mark yourself to deal extra damage.