Talk:The Twins/@comment-4232655-20120530000235/@comment-4715278-20120530042642

If it's your first try and you aren't feeling very confident, swap out your Obsidian Skull/Obsidian Horseshoe/Obsidian shield for a Cross Necklace or something, then make a skybridge of Meteorite/Hellstone, summon them, get on the skybridge of Meteorite/Hellstone, you won't get knocked around if you have a regular Cobalt Shield, plus the Cross Necklace will make you invincible for longer after being damage by standing on Meteorite/Hellstone without an Obsidian Skull/Obsidian Horseshoe/Obsdian Shield.

You want to have the Cobalt Shield and Cross Necklace (For extended invicibility), but nothing that will make you immune to the Hellstone/Meteorite blocks.

Don't get cocky during the fight, remember to keep an eye on your health, otherwise, just incase they do land a hit (It will sometimes happen), you can heal, I also suggest, if it will be your first kill, to have a friend join you, so that you don't have both of them attacking you at once.

If you'd rather not do either of those, I suggest a 1000 block long skybridge of dirt/stone whatever, a Hallowed/Adamantite Repeater or Megashark, with either 2000 Crystal/Cursed bullets for the Megashark and 2000 Hellfire/Cursed arrows for the Repeater, use a Gravitation Potion, they're quite essential for quick evades, I would also use 2-3 Ironskin Potions for the extra 8 defence, focus most of your fire on Spazmatism, as he will do the most damage, but don't focus too much on him, otherwise Retinazer will land some shots on you, before the fight, set your spawn in the Nurse's room (Make sure the bridge isn't too far away), if you'd rather not use a bridge, just fight them close by, but not close enough that they could get your NPC's, whenever you're low on health and are still waiting for the ability to use another Health Potion, you can warp to your spawn (Again, if you're close enough without the risk of them despawning), heal at the Nurse, then go back to where you were battling.

Hope this helps. :)