The mechanical bosses are the first bosses you fight when you get into hardmode, (unless you are crazy and do fishron first) and are an important step in progressing through the game. The common sequence would be to kill the destroyer with a good repeater or daedalus stormbow, and then take down skeletron prime and the twins next, with weapons that suit your class. Many people accept that the twins are the hardest, and some argue that skeletron prime is harder, but I am here to share my unusual but insanely effective method of taking the mechanical bosses, that I think you should try. Upon entering hardmode, keep grinding the WoF until you have secured both a ranger emblem and clockwork assault rifle. Collect around 100 crystal shards from the underground hallow next. Use the new crystal shards to make 2 stacks of crystal bullets. Then, go farm for a cross necklace, and head up to the ice biome to obtain an ice feather. With your clockwork assault rime, go kill wyverns until you can make frozen wings. (you can substitute leaf wings for these if you wish) The rest of the accessories are really anything that suit your needs.it is best to reforge them to warding, because the sheer damage from the clockwork assault rifle + crystal bullets is enought and does not need any addional modifiers. However, it is recommended that the clockwork assault rifle is reforged so that its speed it increased, meaning the three round burst will be performed faster. For armour, you want Orcalculum armour at least, mythril is not enough. If you have the patience to get Titanium or adamantite armour, I suggest you do. You will want the melee headpiece on the armour, because of the greatly increased defence. For buffs, Ironskin and Regeneration are good, and you will probably want to use an ammo box, to ensure that you have enough bullets. If you are confident with your aim, you only need 2000 Crystal Bullets. If you aren't very happy with your aim, or fear you may run out of bullets, I suggest you use 2500 - 3000 crystal bullets. Now, prepare an arena with a campfire, heart lantern, and honey. Be sure to add sunflowers to help dodge, and if you aren't good at dodging, put the nurse in a close but safe house, and heal at her when you need to. Now, Summon The Twins first. Crazy, Right? Who does the twins first? Me! hehe. Focus spazmatism (The green one) first, and then kill retinizer (The red one) before day. Do the same with skeletron prime, and i suggest you try to take down the Prime Cannon and the Prime lazer first. Once these are down, it is basically a more damage-dealing tankier skeletron. Don't Forget to restock your ammo for this fight! I recommend 3000 for anyone. After this, steamroll the destroyer by making a hallowed repeater and using unholy arrows. Now all the mech bosses are down! Thanks for reading, please share your thoughts and opinions below, and tell me what you think of this unusual strategy. Please not that I know there is the daedalus stormbow and crystal serpent, I perfected this method on mobile and console. (I still play pc) Sorry for long post xD