Hey, thanks for playing that far and for writing it all down. Really appreciate it. Here's what I can answer.
The True Immortal milestones are cosmetic. They show under Milestones and give nothing, so no you didn't miss a reset. I've updated the devlog to reflect this.
Regarding relics. There is actually a Mythical rarity which is the highest rarity after Epic (common, uncommon, rare, epic, mythical). Mythical relics can only be obtained during Adventure. So you might want to go for that.
Progression-wise there is no layer behind the Good Path. Nothing comes after True Immortal right now, and nothing new unlocks at age 1600. The Forge is where Demonic Qi is spent, on Epic relics. I designed this for players who (for any reasons) want to return to Good Path (and reactivate Righteous Dao Heart) by spending all Demonic Qi. The Heretical path has two more techniques, at 2,500 and 12,500 Demonic Qi. The Techniques tab shows the next cost, but nothing shows how far along you are.
Two things I am fixing in the next patch:
- At a Heretical rebirth the game will ask which relics to keep, so you don't have to remember the toggle.
- And the first time you start an Adventure it will say what it costs while it runs: no job xp or Sect points, 20% pay, techniques at 20%, and that a danger can stop the game for a choice. Today that is only in a hover tip.
I'm also thinking of implementing auto-resolve/auto-choose during Adventure (just like how tribulations get resolved), so you don't need to manually babysit Adventure mode. And finally Good path-only progression and very late game progression are definitely in my to-do-list for future updates.
Again, thanks for playing so far and for the valuable feedback! Sorry it isn't the direction you wanted.