Teamfight engage and 1-shot potential.
Burst damage and target access
Hitting a champion with 3 separate attacks or abilities in 2s deals bonus adaptive damage.
Deals bonus true damage to enemies with impaired movement or actions.
Collect eyeballs for champion and ward takedowns. Gain permanent AD or AP, Adaptive for each eyeball plus bonus upon collection completion.
Heal for a percentage of damage dealt with your abilities. Increases with each unique takedown.
Creative tools and rule bending
You get free boots at 10 min. but you cannot buy boots before then. These boots give additional MS. For each takedown you acquire the boots 30s sooner.
+5% Max CDR
+5% Summoner Spell CDR
+5% Item CDR
+5 AD or 9 AP
+6 Armor or 8 MR (match-up)
Electrocute is a fantastic burst damage keystone for Annie, opening you up for mid-game one-shot opportunities.
Annie can reliably proc Cheap Shot thanks to her stun. Once you get *Rylai's you can continuously proc the true damage with Tibber's Aura**.
Eyeball Collection is fantastic for capitalizing on successful Predator roams but snowballing your kills/assist into more AP.
Ravenous Hunter's ability sustain pairs well with Annie's tendency to spam [Q] for last hit.
Magical Footwear's raw gold efficiency allows you to hit a strong mid-game power-spike for teamfight engage carry.
Cosmic Insight's general utility pairs well with Annie's wanting to ability spam for multiple stuns in a teamfights.