Overwatch 2

This achievement is pretty easy and should unlock through natural gameplay. That being said, here's a few tips: 1) use your orbs in more confined areas/spaces because they bounce everywhere and might fly away unused if deployed poorly; 2) don't forget that you can use your yellow orb to heal yourself; 3) always use your orbs during team fights for maximum effectiveness; 4) stay on the outskirts of the battle to avoid dying - you must fully deplete both orbs in a single life. Once you've successfully used both orbs in a single life, you'll unlock the achievement and the cool pixel spray for Moira!

The orbs only have a predetermined amount of healing or damage that they can deal, so depleting an orb just means letting it do damage/heal until it "drains". According to the wiki, the damage orb can deal up to 200 damage and the healing orb can heal up to 300 damage.

The way that I drained the purple orb was to shoot it into a room where I knew the enemy would be. For me this was on Horizon Lunar Colony on Defense, so naturally I shot it into the room where everyone on attack usually goes through to flank. Standing on the point and facing out towards the enemy spawn, the room is out towards the first choke and to the left. Attackers VERY frequently use that room as a way to flank your left, so shoot your orb in there! Frankly Horizon Lunar Colony seems the best map overall for Moira since there are a ton of close quarters spaces for you to launch your orbs in!

As for the healing orb, as you may have noticed by now, you can drain it yourself if you have taken enough damage! I was on the point and kept shooting the healing orb out to my teammates and made sure that I stayed on top of it as well to soak up as much healing as possible.

The achievement will pop shortly after you've drained one of each!

Overwatch 2 Solution

What does Biotic Orb do?

Biotic Orb is bound to Moira's Ability 2 which is by default.
After selecting Biotic Orb, using Primary Fire, which is by default, throws a Healing Orb and using Secondary Fire, which is by default, throws a Damage Orb.
Biotic Orb allows Moira to throw an orb which can either damage or heal, depending on the orb you chose to throw. These orbs bounce until they are depleted of their resources or after 7 seconds.
The orb will go fast until it finds a target, at which point it will slow down to about walking speed.
The orbs can heal/damage any number of targets at a single time and can go through barriers.
The healing orb does 65 healing per second for a total of 300 health. This means it will take ~4.6 seconds to deplete on a single ally.
The damage orb does 50 damage per second for a total of 200 damage. This means it will take 4 seconds to deplete on a single enemy.

Note that it can fly pass the sky boundary. Abilities that can delete projectiles, such as D.Va's Defense Matrix, can delete it and Genji can reflect it.

How do I unlock Simple Trigonometry?

You will want to deplete both orbs, so team fights are your best bets.
Throw your damage orb at a team that's behind a shield, at a narrow choke, on an objective, or being affected by a crowd controlling ultimate. Additionally, if you're fighting or see someone fighting a tank or multiple enemies in a small area, throwing you're orb in there will help deplete it.
Throwing your orb when multiple teammates are low or when they're stuck in an ultimate can help secure the healing required. Again, an ally that need healing in a small room, especially a tank, can help deplete your orb. And, just as a reminder, the orb does heal yourself.

Boosting Methods

The Lockdown Method

This is the most common method to boost Overwatch that requires 10 people.

1. Get a group of 10 people.
2. Get into two groups of 5
3. Disable cross play
4. Queue for Quick Play Open Queue at the same time and hope it matches you guys up
5. Once you match up, go into a small room and have some one from the enemy team damage one of Moira's ally for at least 300 damage and use a healing orb to heal them
6. Now damage the enemy with a damage orb (remember, they must have at least 200 health).

Remember to keep the objective contested unless it's a Control map which will not need contesting unless someone captured it.