The Twins are a hard boss to beat in Terraria.Start with the first step to learn how to beat them.
Step 1: A proper fighting area is needed.
A long skybridge is recommended because the Twins mostly attack by charging.Multiple campfires or heart lanterns can be kept for faster healing.You can use wires to connect the statues.
Step 2: Go ahead and gear up.
The Twins are very fast, so it's not a good idea to have melee weapons.You must have at least 10 healing Potions and Wings.
Step 3: Get some good armor.
Titanium/Adamantite armor has a great set bonus and multiple buffs.Mithril or Orichalcum armor can also be used if Titanium/Adamantite armor is not available.
Step 4: Get strong weapons.
A ranged weapon or magic weapon is required.
Step 5: Stand at the end of the sky bridge.
Step 6: The nimbus rod is used.
It can be used wherever you think it will hit the boss.
Step 7: The first thing you should do is focus your fire on Spazmatism.
When it's killed, focus on it.
Step 8: Run back to the other side of the sky bridge.
Focus on dodging them first, you are vulnerable at this point.