I don't remember, it has been a while since I played this but you can just make multiple save files to try out these things.

Ok. Will just save b4 the silent tower 1 and then go back if im 10 + above. Do you unlock the final sanctuary level after going to the wardens or do I need to travel somewhere to unlock it. I did acquire the monolith fragment.

Silent Tower and Sanctuary are always available to visit any time, and if you cannot unlock final Sancturary level it means you need to progress further into the story too.

For the fear of being too OP, in Ys VIII the level gap this time is generally much wider - when you are around 6x - 7x you can face enemies & bosses around 8x and much much higher, regardless them being optional or main. And if playing on Nightmare or Inferno difficulty, your level doesnt matter much as they pretty much wipe you in 1-2 whiffs as well. And even if you do feel OP, how about dynamically tuning it by handicap yourself (no one dies in party once, no healing, solo only by putting others into defensive).

In short, you don't have to match same level as bosses to fight them equally. Therefore your weapons, armors and accessories matter the most.

Finally, if you are unsure of sth, missing out sth => save often! devs give you 254 slots for a reason

ok cheers. Im playing it on nightmare mode because hard became easy when i started to level up and ye im somehow the bigger random enemies 2 hit me lol. Just got the icharus armor so maybe 3 hits now. Its mainly the silly status effects that kill me than their hits. I miss the item from classic ys that nullifies the effects, this pendant doesnt fully which killed me because i didnt read the full text xd. Cheers, I'll do the silent tower boss inabit and then see if I can unlock the sanctuary. Was getting to 200 rep before I logged off yesterday incase the epilogue starts soon.

Well, I had beaten the final boss and luckily I listened to you and saved beforehand because the last crypt and side mission weren't really popping up before checking the town after having entered the final dungeon. I find it really dumb because I had finished up all the raids/available missions before entering it so 1 would assume that is it, but no lol, they had to add some for after... Ahwell, at least they were both cool bosses so I dont mind redoing them after the final 3 hunts and the lvl 99 boss.