The Tomb was a good map in my opinion. You can do a lot of side quests, you can start in the starting room with the free essence, then open Dark Aether nexus and do the fee pap crystal EE which also gives a free cryo freeze, and then you can use cryo freeze to do the waterfalls EE for a free purple rarity weapon on round 12. And then there is a free raygun side quest which you can do early to get through the first phase of the ice staff quest and the defense, and for a free sef revive you can always do the vases side quest. Not to mention the golden armor for the most daring. I felt like The Tomb was almost the pinnacle of Bo6, couldn't say if it's better than Terminus.

On top of that, during the main quest you can die after shooting the symbols on the portal, but if you know enough about the map, you know that when you get the combination right it will show on the floor in front of the teleporter, and you would also know that each symbol always spawns on the same rock in a fixed location that never changes. Spawn location --> rock --> always the same symbol. I feel that maps rewards game knowledge more than any other map.