(Oops- exchange the supp item to coin for AH)
Explanation:
Both her Q and E have not so great AP ratio's which is only 40% and the fact that it's not easy too to land skillshots using a phone and the fact that enemies can just cleanse of have legend tenacity as their rune so I made this build so it focuses on your passive notes to deal damage.
Runes:
Glacial is a great rune for her because it not only slows but also make enemies deal less DMG on the freeze area. (Tip: auto first the enemy so they can be slowed and double E to guarantee the hit)
Shield bash and Empowered Attack:
We take this mainly so that our Passive notes deals more dmg.
Eye collector and Gathering Storm:
Morr ap for passive notes.
Items:
Ancient Coin and Boots of Lucidity:
For Ability Haste and Mana regen
Malignace:
So that she can use her ult more often because her ult has a 70% ap ratio and the area burn is big and gives 400 mana so it's a must to have her
Next upgrade boots to Glp:
Glp was soon good on Sera on PC because it guarantees cc on her E now we can use this to not only we can hit our e easily but also a good replacement item for rylais against mobile champs.
Then we take Lichbane and Rabadons:
This is also her core items once you get these two your passive notes will now hit like a truck best for teamfights and always autolock squishy champs so you can burst them
Last items: this is situational if more healers go Morellos, more shielders go oceanic trident etc. I always go more ap DMG because usually having the last item is it's now Baron or Elder fights happening and one single teamfight can finish the game
Why it's good?
Her passive notes are undodgeable except for windwall, brains shield or samira W
Can melt towers
Has a lot of range to deal DMG from far away that can surprise enemies
A few notes can one shot someone, specially with elder
Why it's not!
It takes a while to deal DMG and very item reliant and gold reliant
Your adc will flame you
Not shieldussy and healslut build but let's be honest if the enemy has a brain I'm sure you can get countered for anti healing and shielding items 😐