Novels like Manifold Mirror Mage

All share Dungeon Crawler, LitRPG and Progression

Assassinate Wonderwind
4.70
Dungeon Tamer: The Lumberjack's Law
3.88
Love, Life, and Lycanthropy!
4.65
System Lost: My Own Best Friend
4.67
Mirabelle's Boots - The Cruel Fairy’s Wish
4.56
Dungeon Devotee
4.69
The God's Gauntlet: A Multi-Dimensional Scavenger Hunt
4.48
The Center for Dungeon Management, Book 1: Gate Crashers
4.66
Omen of a Bluebell
4.59
Isecant - Party based LitRPG-lite / Progression adventure
4.49
Hell Hound Evolution
4.64
Death March: An Apocalyptic LitRPG
4.47