The Twins:

• Have a full set of hallow, or frost armor, and use a chain gun with clorophyte bullets, they seek their targets. 
• Wire up star, and heart statues on the bottom, and other pieces of the arena.
• Megashark, uzi, or chain gun, are different optionss for a long ranged weapon. also ichor or cursed bullets (900)
• Obsidian shield, and a set of leaf or higher wings to navigate the arena.
• Defeat Spaz first because te damage from the cursed inferno adds up quickly.
• Then kill retinazer... after spaz, a few lazers here and there are nor that hard to avoid.
• If all other attempts fail, use a nimbus rod to lower the spaz'es HP.

The Destroyer:

• Bring something like a pumpkin pie, marshmallow on a stick, or a bowl of soup.
• Star Veil, or a cross necklace would be VERY helpful, it will hit maybe two or 3 segments whenever you get hurt
• The magma stone, or the full set of frost armor would inflict extra damage to the destroyer so i would recommend it.
• Fishron, frozen, or leaf wings are required, because he will come up from underneath you.
• Horseman's blade is very helpful, (as it spawns a pumpkin head comes and fights for you, the Terra blade is also very good choice.
• A chain gun, or galligator with exploding or clorophyte bullets will also be effective.
• If you get ahold of the queen spider staff, it would be very helpful in this fight, plus if you have a nimbus rod, you can put it on the destroyer, and makes maximum damage, and kills the probes.
• The star cannon is very useful because of its high damage and piercing ability. 

this is a very good not very complex house made to house all the NPC's and more, in case of an update. this house is the project that is currently underway in my new world.

Skeletron:

• Shadow/Crimson armor is the better end, if you are a more experienced player, gold or sliver would work.
• Spiky balls, sticky grenades, or beenades are crucial in defeating skeletron, throw them at his head, and wait until he has low health, then take out a ranged weapon, musket or flail, and finish him off.
• ALWAYS bring at LEAST 5 healing potions, 10-15 is recomended

Queen Bee:

• Bring at least 5 healing potions
• ironskin, regeneration, and swiftness potions are a must have for this fight
• Hermes, or Spectre boots could also be very helpful for the swiftness De-buff.
• You should have at least 300 heath and gold armor, or higher
• Nights edge, fireygreatsword, or nights edge
• the aqua scepter is a great magic weapon, if you set up a star statue, to help negate having no mana.

And finally, just keep moving and you most likely will not get hit by the stingers.

This arena is used for defeating the Eater Of Worlds and the Eye Of Cthulhu, I would recommend using a ranged projectile weapon, or magic weapon from the dungeon. (water spell, or aqua scepter.) I would also recommend having mana potions and a high amount of maxed mana. You defeat him by moving up and down on the platforms while firing you magic or melle weapon at him at ALL times! If you stop, he might dig under you, do not stop moving!

1. 

This will be our first boss arena, to get you into hardmode, you will need to make a simple bridge, it has to be a straight line or it will not work! (Just kidding, if you make proper stairs, or you have wings, it will work just fine.) next, you need to make a small lava pool, just 3 blocks wide, and make sure it is enough to burn an item. then you set out to get the guide voodoo doll, there is also a clothier voodoo doll, but it is only used for killing the clothier, and not for spawning the Wof, so do Not throw it into lava! then go to the lava pool and throw the voodoo doll in, by now, you should have a good pre-hardmode sword, and a good ranged weapon, pistol, or Phoenix blaster. then Hermes boots would be a good accessory to have because it would allow you to run fast in front of the Wof and shoot silver, or musket balls at the Wofs eyes or mouth, (aim for the eyes, it gives a better critical hit chance. take about 900 silver bullets or you will run out! this arena can be used again and again, just follow these simple rules, and you should never die!

If you are pre-hardmode, you will make the lihzahrd bricks into any building material, high tier preferred, like obsidian or obsidian bricks. this is so you can fight bosses, around it, and near it without destroying the farm, or grinder. If you are in hardmode, I would suggest that you wore beetle, or Tiki armor, because they attract enemy's also, if you are in hardmode, or pre-hardmode, at this point you need to put down water candles! they will attract more mobs to come and be killed by your dart traps. if you want, you can put a long line of crimson, (corruption will NOT work) off to the side, then it attracts the crimson mobs too, this can also be done with the hallow, as seen in the picture below.

First we are going to make a decent farm, for money... if you are in hardmode, this farm will give you about 27 platinum coins per-hour in real life, not the game time.