Generalized and flexible Mercy build that allows for high skill expression with Guardian Angel. Also spreads power evenly between resurrect, GA, and Valkyrie. This build tries to improve on what makes Mercy good while limiting the amount of conditional effects and micromanagement.
Item purchase order
Round 1
[Caduceus Staff] chains to your previous target for 3s, at 50% effectiveness.
When you die, gain 15% Ultimate Charge.
1,500 
While on the Objective, restore 8 Life every 1s.
1,000 
At the start of the round and when you first respawn, gain 20% Move Speed for 10s while out of combat.
1,000 Round 2
At the start of the round and when you first respawn, gain 20% Move Speed for 10s while out of combat.
1,000 
When you spend your Ultimate Charge, grant nearby allies 75 Overhealth for 3s.
4,000 Round 3
When using [Guardian Angel] on allies below 50% Life, [Caduceus Staff] heals them 30% more for 3s.
4,000 Round 4
When you die, gain 15% Ultimate Charge.
1,500 
4,500 
When you use an ability, gain 25 Overhealth for 3s.
4,000 Round 5
When [Guardian Angel] ends, heal your target for 4 Life for every 1m you traveled.
While on the Objective, restore 8 Life every 1s.
1,000 
[Guardian Angel]'s cooldown starts as soon as you jump or crouch.
10,000 Round 6
When you spend your Ultimate Charge, grant nearby allies 75 Overhealth for 3s.
4,000 
While healing an ally below 50%% Life with your Weapon, deal 15% increased Weapon Healing.
11,000 Round 7
While [Valkyrie] is active, the healing and damage boost of [Caduceus Staff] are automatically applied to nearby allies.
4,500 When you use an ability, gain 25 Overhealth for 3s.
4,000 
Restore 3% of your Life every 1s.
10,000 
After spending your Ultimate Charge, gain 100 Overhealth for 3s.
11,000 
10,000 TLDR; Choose whichever power/last item you're comfortable with or need to win the game. Dealer's choice on powers here. Crepuscular Circle is the best hands-off power; Protective Beam will get more value the more your team is grouped up but requires more micromanagement; Glass Extra Full is good if your team has divers/fliers; Renaissance is good for spamming Valkyrie and if your team has a constant stream of dead dps; Distortion gets the most value from high sustained dps characters like Bastion or for tanks that have their own self-sustain like JQ. Serenity is a good choice against teams with high poke or bad dive dps. *Items are also dealer's choice, here are some recommendations: - Martian Mender: Good brain off item that works with any power choice above. - Blessed Boosters: Great for high skill mercy shenanigans and if the enemies have a hard time with fast targets. Also good with any power choice - Chain Evoker: Only useful if you choose to go with the Distortion power. - Vanadium Injection: Gives a huge power-up while at 100% ult charge, only use if you choose a power that doesn't rely on Valkyrie or you tend to sit on max ult charge frequently. - Geneticist's Vial: If you're the only main healer and feel like you are the carry and NEED to be present during this final round. Good with any power choice. - Divine Intervention/Nebula Conduit: Both items are good against high burst dps teams and works great with Serenity. Choose whichever you're more comfortable with.
