[@Disciple Cain]

That is generally the idea. Personally, if the massive raid on a certain guild happened in this reality, Bright_Ops wouldn't have entered the place himself. Instead he would have been supplying an army of high level, well equipped machine solders (Think Skittri from Warhammer 40k) to combat the enemy solders and an impressive array of cannons to blast apart the surface defenses. 

Not because he has anything against Ainz Ooal Gown. He just believes they've created one hell of a fortress and he wants to see if he can figure out a way to defeat it. Personally, I feel like Bright would just bypass the portals completely and instead either create a machine to drill a path through Nazarick or use a combination of drilling and explosives to get the job done. Would it be a time consuming process? Yes. But it's more likely to work then being funneled into Ainz Ooal Gown's prepared murder zones.