Fix crash when optimizing with Scroll set

[nguyentvan7]

Describe your changes

• Fix crash caused by putting the artifact set count check in the innermost layer of the nodes instead of outermost
• Also simplified some of the logic

Issue or discord link

Testing/validation

Create a TC build with Scroll 4p and optimize
Don't crash

Checklist before requesting a review (leave this PR as draft if any part of this list is not done.)

• I have commented my code in hard-to understand areas.
• I have made corresponding changes to README or wiki.
• For front-end changes, I have updated the corresponding English translations.
• I have run yarn run mini-ci locally to validate format and lint.
• If I have added a new library or app, I have updated the deployment scripts to ignore changes as needed

[github-actions]

[frontend] [Wed Aug 28 22:40:23 UTC 2024] - Deployed 92cd685 to https://genshin-optimizer-prs.github.io/pr/2413/frontend (Takes 3-5 minutes after this completes to be available)

[frontend] [Wed Aug 28 22:40:56 UTC 2024] - Deployed 92cd685 to https://genshin-optimizer-prs.github.io/pr/2413/frontend (Takes 3-5 minutes after this completes to be available)

[frontend] [Wed Aug 28 22:51:24 UTC 2024] - Deployed 7adaca7 to https://genshin-optimizer-prs.github.io/pr/2413/frontend (Takes 3-5 minutes after this completes to be available)

[Wed Aug 28 22:56:28 UTC 2024] - Deleted deployment