[lua] Evisceration bugfix

[Skold177]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

• Corrects the critVaries modifier of Evisceration to be 10% / 25% / 50% - matching the wiki.
  https://www.bg-wiki.com/ffxi/Evisceration

• Removes a deprecated "crit200" modifier - which has since been removed and is no longer referenced anywhere in the codebase.

Steps to test these changes

Use Evisceration