Harem Q&A For Future Worlds

Dear readers, this chapter will mainly consist of a question that require opinion-based answers, rather than a poll.

The question is simple: What should our main character do with his harem when he goes on different quests?

I would appreciate your opinion regarding the various forms and challenges that our main character will encounter during some quests in relation to his harem.

Simply put, if he is forced into certain forms, what should be done with his harem?

Additionally should our MC involve himself with Rias and the rest?