Greetings,

If we were to add bonuses for specific end-game content such as the bonuses on equipment for reives and campaign, this would make it so players need to keep these pieces of equipment until the content becomes obsolete. Additionally, we’d also have to start deciding the original stats of equipment based on the bonus effects, and this would create a lot of equipment that is not very attractive for other content.

As this isn’t a desirable situation, and keeping in mind that Delve has been created as the current end-game content, we don’t feel that it would be appropriate from a game balance standpoint to add powerful buffs so that it becomes easier to clear the content.