[SUGGESTION]Stinger/Nashor's Tooth rework

When working on a large AP rework idea I came with this idea in mind:

# Stinger

• Recipe: + + 350 (=1200)
• Stats: 20% Attack Speed, 50% Base Mana Regen, 10% Cooldown Reduction.
• UNIQUE Passive: Basic attacks restore 2% of your maximum mana on hit

# Nashor's Tooth

• Recipe: + + + 365 (=2800)
• Stats: 60 Ability Power, 30% Attack Speed, 100% Base Mana Regen, 20% Cooldown Reduction.
• UNIQUE Passive: Basic attacks restore 2% of your maximum mana on hit
• UNIQUE Passive: Basic attacks deal 15 (+15% of Ability Power) bonus magic damage on hit.

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Onhit mages in the midlane where always been an intressting concept in the midlane. While Nashor's Tooth was always been an intressting core item on them. With onhit mages I'm talking about champions like Kayle, Diana, Teemo and the recent released Azir. Add this moment the concept of onhit mages still has many flaws:

• always seem to be able to scale harder with attackspeed than ability power. The lack of mana sustain often places him into the jungle where he can snowball out of controle. The recent rework to hybrid itematisation didn't improve this even slightly.
• always seem to have struggled with mana sustain but she was forced in onhit stacking to forfill her job. This often forces her into the jungle. While in the midlane see sometimes see's play with but riot already stated they want to rework that into a bruiser item add some point in time.
• the devil himself. Always seem to be able to scale harder with ability power than attackspeed. The lack of mana sustain is crucial to become a snowballing factor or just another dead weight.
• this is the first of them that started a trend to rush after been nerfed into the ground. It's still not perfect but it get's the job done.