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Roboteer
Defeat 12 Master Tamers in Broken Isles with all Mechanical pets.
Roboteer is a 5-point achievement requiring you to defeat any 12 of the 15 Master Tamers in the Broken Isles using a full team of three Mechanical pets.
Build Your Mechanical Team
Recommended pets across the tamer fights include the 
Mechanical Pandaren Dragonling, the 
Iron Starlette, and the Sunreaver Micro-Sentry, as these cover the majority of the 12 required fights. Lil' Bling and Cogblade Raptor are also used in specific encounters.
Defeat Master Tamer Flummox
Flummox is a difficult fight due to a combination of mechanics that are strong against Mechanical pets and reductions to speed and attack. Use Sunreaver Micro-Sentry with Extra Plating, Fel Immolate, and Call Lightning, then switch to Cogblade Raptor for Exposed Wounds, then to Lil' Bling for Inflation, and finish with Cogblade Raptor using Batter.
Defeat Master Tamer Durian Strongfruit
Start with Sunreaver Micro-Sentry using Extra Plating, Call Lightning, and Fel Immolate until it dies, keeping Lightning on cooldown. Swap to Mechanical Pandaren Dragonling and use Flyby, Thunderbolt, then finish Roots with Explode. Complete the fight with Darkmoon Tonk against Beaky, swapping only when a pet dies.
Defeat Master Tamer Varenne
Use Mechanical Pandaren Dragonling (Breath, Thunderbolt, Decoy), Iron Starlette (Wind-up, Powerball, Supercharge), and Sunreaver Micro-Sentry (Laser, Haywire, Supercharge). Against Gusteau, start with MPD and use Decoy, swap to Iron Starlette for Wind-Up, Supercharge, Wind-Up, then finish with Sunreaver Micro-Sentry's Haywire. Against Remy, use Haywire then Laser, swap to MPD with Breath until Remy is near 60 health, use Decoy, then finish with Breath. Against Dinner, use Thunderbolt, Breath, swap to Iron Starlette for Wind-Up, Powerball, Supercharge, then Wind-Up.
Complete Remaining 9 Tamers
You only need 12 of the 15 available Master Tamers, so after completing Flummox, Durian Strongfruit, and Varenne, defeat any 9 additional Broken Isles Master Tamers with a full Mechanical pet team to finish the achievement. A full list of strategies for all 15 tamers is available at http://www.wow-petguide.com/index.php?m=LMechanical