Coolex
I'm surprised Nanahoshi hasn't been bothering Rudeus about her research. I mean, from what she knows about Rudues, he's someone who is incredibly knowledgeable about magic and knew her in the future. I'd think she'd want to know what he knew about her research to get home.
Maybe improving the relation between rudeus and sylphy because they are already close to the age where in the original line they had already married or bring badigadi into the story because after rudeus gets his demonic eye badigadi is intrigued/jealous about everything kishirika told him about rudeus.
I hope that Orsted gives the God-Rank Summon (Spirit) Magic Scroll to Rudeus as per their deal to protect Rudeus's family. Rudeus should learn & decipher the God-Rank Summon (Spirit) Magic-Circle on the Scroll before using it & just like the Original it should've lead to the Summoning of Pergius's familiar Arufnami as Rudeus's New Spirit-Servant. Pergius should've given God-Rank Summon (Beast) Magic-Scroll to Rudeus through Arufnami as an equivalent exchange to release Arufnami from Rudeus's service. Rudeus should've studied & learnt the God-Rank Summon (Beast) Magic circle on the Scroll before using, resulting in Summoning of Holy-Beast LEO. Then Rudeus should've used the newly gained knowledge of God-Rank Summon (Beast & Spirit) Magic-Circles to create a modified version of God-Rank Summon (Spirit) Magic-Circle to create an Army of Spirits. I would be reasonable to show that in the previous timeline, Pergius taught Summon (Spirit & Beast) & Barrier Magic to Rudeus & Zanoba upto this King-Rank. This Knowledge of King-Rank Summon (Spirit) Magic-Circle should be the reason why Zanoba was able to complete the Automaton & Magic-Armour whereas Rudeus was able to learn Teleportation & Time-Travel Magic.