I can't Ascend my characters because I can't fight the bosses due to World Level. How can I get the Ascension materials? [duplicate]

I have recently completed a quest which has increased my World Level to 4. I didn't realise at the time that this would push all the boss monsters levels up to around 60 to 62.

I only have one lv60 character, and now I need to ascend other heroes I do not have the power to defeat the boss monsters to get the materials I need.

Have I locked myself out of being able to ascend my other characters? The materials I need are from lv30 bosses, but they're all lv62!

My team is this one,

I am trying to ascend them all up to 60 now to help, but the materials are proving nearly impossible to obtain

Solution 1:

Thanks for the contributors in the comments, I think I have discovered the issue.

Genshin Impact has a lot of things that you need to level up around your characters, rather than just the characters main experience.

1. Character EXP
2. Talent levels (Dependent on their ascension level)
3. Weapon level
4. Artefact levels
5. Character ascension level

Some of my characters were level 40, but had a full set of +0 artefacts on! I think the game assumes you have levelled all these pieces once you reach World Level 4.

Some advice I've researched on YouTube suggests picking one or two characters to focus on in the game, in order to push all these various levels up in sync with your character levels.