In a anime viewers point of view it's a great episode with sad irony due to the last scene. In a LN readers point of view it is fantastic due to the reality of the twins fates that is not displayed in the episode. The only scene that is disappointing if I'm remember correct (or its in the previous episode) was when the "Heavy Masher" party was running away from the elder liches and completely skipped the scene in the LN showing
that the group thought the 1st a elder liche they met was the master of the tomb.
This is one of those episodes that shows how evil and intelligent ainz can be since he sent some adventures to die in his own dungeon/domain just to have the excuse to attack the empires and say that he didn't started the conflict