About us: We are polish community guild located at Draenor-EU realm, semi casual-hardcore guild playing mostly 10 man.
What we did: First public recorded speed kill on Siege Crafter 10 HC (movie link below)
OLD DOGZ - DRAENOR EU vs. SIEGECRAFTER 10HC - ZERG
Warcaft logs: warcraftlogs.com/rankings/report/GTqvQ1c8zAxM7HdC#boss=1601
Setup: 1 Tank, 1 Healer, 8 DPS
What we used:
Tank: We had warrior tank (imho the best tank for this) for raid cooldowns (banners, cry, shattering throw) + he actualy does a tons of nice DPS.
Healer: You need a healer who will be able to solo the encounter and keep tank + raid alive - the one we used for our kill was disco priest.
DPS: This tactic is a simply dps check, which means you want kill boss actualy before he kills you - what we had on platform: 2x Hunters, 2x Enh Shamans, 1x Unholy DK, 1x Mage, 1x Warlock - this setup gave us high constant possible DPS to deal with boss, his add and missiles.
Assembly Line: If you wana kill this boss like this you need hunter to be able to do ALL ASSEMBLY LINES solo. As a guy who was doing that for my team i can tell you that is the hardest part of this boss mechanic because it's very difficult to manage all cooldowns you have (you never know how many belts you will have to solo - we get the kill after 4th line). What i was killing: Mines and Magnet. Make sure the hunter you will be sending on assembly line is able to do at least 500-600 k dps each time he jump to kill the weapon.
Have fun & Good luck