After that brutal fight in the void, Scimitar had told the War Maniac Pavilion Origin Gods that there was a chance that when the strongest 'Promotion' faction of the Origin Gods milked Draco of all his use in terms of Refinement, they would likely spare his life or imprison him at worst. This was precisely because of those three fellows, who were now three of the strongest among the Promotion faction.
Gaining Control at Tier 6 had given them a boost in power akin to being a Super Saiyan fighting against a normal Saiyan. How could the normal fellow even match?
The caveat was that they did not have the Chaotic Human Bloodline of Gerdo Galaxy, so they could never progress from there. Even when Draco reached Control at Tier 10 and above, they would forever be stuck at Tier 6.
However, Tier 6 was enough!