UPDATE 5/7/25: So I've been using this build for the past week and I genuinely have not lost a game while using it, it's so good!
I took this build from Eleyzhau's video: https://www.youtube.com/watch?v=V6oWAIc0HDg Please go check them out and subscribe! They're a phenomenal Mercy player and their videos have taught me a lot!
I will also type what they say in the video/their reasoning for what they buy!
Rounds
Player Loadout
Powers
Items
Optional Items
Stats Impact
Core
Stats
Weapon Power
Attack SpeedRound Notes
Round Notes
"The first round I always start with Threads of Fate - this is one of Mercy's best powers in my opinion! I like to juggle beams around to keep getting use from this power, the gameplay is very fun!
The main stats I like to build for Mercy are weapon power + attack speed - so I'll start off with these items. Using a combination of these powers will make Mercy's heals more effective. Then I like to take [First Aid Kit], but the Armor Pack would probably also work fine."