 If you liked
Reikenzan: Hoshikuzu-tachi no Utage
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 ...then you might like
Choujin Koukousei-tachi wa Isekai demo Yoyuu de Ikinuku you desu!
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In both anime the Main Character is OP as hell and a super genius. Both anime have magic, both focus on building an empire. They also both share the desire to stop evil people from controlling/abusing their citizens. Both also have the classic light-hearted Isekai vibe, though Reikenzan isnt an Isekai anime. Other than that Reikenzan has a much stronger focus on training to become better