Ark Survival Evolved - SOLO ALPHA Rockwell Boss Fight

Easily Legit-Defeated Alpha Rockwell with a Reaper King.
Legit not official. Settings are suited for Singleplayer experience & tailored for King Titan Fight.

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Server settings:
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[] Max Dino Lvl=240(8x)
[] Taming Speed, Resource Harvest rate - 3x
[] Imprint Quality - 100%(default is 20%)
[] Egg Hatch, Breeding & Maturation/Imprint timers - 6x

Only Admin Cmds/Cheats allowed(I use): slomo, ghost, gamma

Alpha Rockwell is second only to King Titan in difficulty.
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Strategy:
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[] 1x Reaper King & 1x Glowtail
[] Ascendant Assault Rifle(380% dmg) & Pump Action Shotgun(348% dmg)
[] ~131x Medical Brew
[] Use Glowtail Charge light ONLY when fighting Elemental Reaper Kings. For all other cases, turn it off. Tested & found that its makes my Reaper practically invulnerable to any damage.
[] From round 3 onwards when tentacle AOE Electricity attacks become active, make sure to be on central platform at start of round. This is since, at start of round, the closest 2 tentacles on either side of central platform may start AOE attack which will ruin your day easily.

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Conclusion:
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Only with my settings(easier than official) is the strategy I used possible.