Ancients Awakened/Sagittarius Strategies

Sagittarius is a Pre-Hardmode that serves as the first boss of the Void. It is considered a challenging boss due to the variety of ranged attacks it can unleash and the environment it is fought in.

Terrain Preparation
Sagittarius can be fought in the void at any time if Skeletron is defeated. The best way to fight Sagittarius is to use multi leveled platform arena in between the four void islands. Fighting Sagittarius without an arena is very dangerous as one wrong jump could lead to the player falling down through the gap between to islands.

Armor

 * / are great overall armor sets for any class at the halfway stage of the game.
 * is one of the best choices for melee players as it combines good damage with good defense with the added benefits of the set bonus.
 * is a very good armor set for ranged players since it has good damage and a set bonus that decreases ammo consumption.
 * is the best armor choice for mage players as it gives good damage and the ability to automatically drink mana potions which frees up an accessory slot.
 * is an excellent choice for summoners since it has great damage, a great amount of minion slots and a set bonus that causes minions to set enemies on fire.

Accessories

 * is great for maintaining distance with Sagittarius.
 * can give the player invaluable air control which when combined with the low gravity of the Void can let the player stay airborne for prolonged periods of time.
 * is a better accessory for air time if the player is shooting for more control over movement.
 * can aid in damaging Sagittarius by piercing its defense.
 * is a very useful accessory as it can prevent getting stunlocked due to knockback.
 * is an all around great option for dodging out of the way of attacks, ramming into Sagittarius to avoid taking damage from contact damage, and getting in extra damage.
 * is, like the Bulwark, an all around great option, due to the insane damage resistance it provides.
 * is a great accessory which gives the player great mobility.
 * is an amazing accessory for summoner players as it increases minion damage while increasing sentry slots.

Melee

 * is a very handy weapon to have for attacking Sagittarius at a good range, as well as inflicting the "On fire!" debuff.
 * The or  are a great help for reaching and damaging Sagittarius.
 * The is an exceptionally good weapon to use on Sagittarius in terms of both reach and power, although obtaining it may require some work.
 * The, though outclassed at this point of progression is still viable as it allows players to stay a safe distance away from Sagittarius while damaging it.

Ranged

 * is a very strong weapon with great damage and a fast fire rate however Bone Arrows might be hard to obtain due to their rarity.
 * The is the best option to use in this fight if the player can obtain an ample amount of Fallen Stars.
 * The can deal a lot of damage up close.
 * The remains a good option as it can deal consistent damage.

Mage

 * The is a superb option for this fight thanks to its high damage.
 * is a good option since it can deal good damage when the player stacks multiple scythes on one another.
 * The can be used effectively if the void islands can be used to bounce the projectiles.
 * The is a great if the player wants to focus on dodging more.

Summoner

 * The, is the best option for summoner especially if the player can get a large number of minions.
 * The is the best sentry to use for this battle thanks to its high damage.
 * The is a good choice since it has ok damage and can be summoned at the same as other Tavernkeep sentries.

Miscellaneous

 * The can be used to nullify the Void's decreased gravity to some extent.
 * A good hook like the or the  can help greatly during the fight as they ignore the low gravity of the Void.

The Fight
Sagittarius uses an array of projectiles in tandem with charge attacks to attack the player. Getting used to the properties of the projectiles is the most important thing you will have to learn as projectiles are Sagittarius' strongest weapon.

The void lasers are the most basic projectiles Sagittarius uses. Sagittarius does not account for the player's speed so it is easy to avoid the lasers by running in one direction.

Void rockets are homing rockets that explode upon contact. They are strong and can stunlock the player due to the low gravity environment of the void however they are very slow so the player can outrun them.

Void stars are projectiles that bounce after contacting solid surfaces. They can be avoided in a similar way to the void lasers however these can bounce off of the void islands, making them more dangerous than the void lasers.

Death rays are beams that linger in an area after being fired. The beams are telegraphed by a red line and can't account for the player's speed so they can be outrun, but the player has to be careful as they can accidentally get hit by a lingering beam.

Void mines are gravity affected mines that are launched in an arc. When they contact a solid surface, they detonate and create an effect similar to the rockets shot by the Electrosphere Launcher. These mines pass through platforms and can be outrun, but if the player is running on the same level as the void islands they may run into problems when trying to dodge the detonated mines.

Void lightning bolts are slow moving projectiles that are shot by Sagittarius as its health decreases. While they don't pose that big of a threat on their own they can catch the player off guard when they're trying to dodge other attacks.

After one projectile attack cycle Sagittarius will line itself up with the player and will perform a fast dash in an attempt to ram the player. This can be avoided with vertical movement.

Keep in mind that as Sagittarius' health decreases, the dashes will become faster and more frequent.

General Tips
Sagittarius will try to position itself diagonally above the player, prepare to dodge accordingly.