Emilia Build - Horizon Walker

Maximize Magic ATK with Miraculous Injection - Emilia's Miraculous Injection can increase the ALL ATK based on her Magic atk, that means the higher your magic atk the more all atk you will get. this buff can give up to 1000 All atk that mean Melee and Magic and ranged ATK.

Unique trait diagnosis mechanics - Emilia's "Diagnosis Method" trait allows Basic ATK on allies, granting AP through "Stimulus Response Test". This is not bad little bit of AP generation but nothing crazy about it. it give little tbh.

Sacred Prescription Protocol - Emilia's "Sacred Prescription Protocol" give 3 type of buff, Crit damage, AP&SPD, and Element Boost. We mostly go with crit damage becuase it give the most out of damage output. element Boost there alot of discussion about it. but to put it simpley there is no character that really benfit from it as of today 12/6/2025.

Field Medbay - Emilia's this passive quite hard to understand, first it need EX5 for character to get the most of it. It will increase the effectiveness of her buff skills. if you do 100% ALL atk it will be 120% or 180%. Same with other buff like crit damage or AP&SPD or Element Boost.

Reckoning of Sin Stigma - I choose this stigma because it give AP recovery and starting AP. I am going to use everything in turn 1, turn 2 everythin on CD. so we need starting ap and ap recovery to make it work.