I'll say if you're taking the weapon from level 80 to 90, it consumes a lot of resources. So, you can pause level 80 ascension if you want to. That way, you'll have decent damage and weapon level to fight in the spiral abyss. If you're a casual player, take it to a level where you can easily fight overworld enemies. Overworld enemies' strength depends on your world level, and you can even lower your world level if you want to. So, as long as you're comfortable with weapon level, keep it as it is, collect some resources then pour them into a weapon.