mobskill script corrections

[TeoTwawki]

1. correct function call order.
2. missing local var.
3. remove unneeded requires.
4. remove unneeded variable.
5. remove unneeded outer parentheses.

I affirm:

• [x] that I agree to Topaz Next's Limited Contributor License Agreement, as written on this date
• [x] that I have read the Contributing Guide and the Code of Conduct
• [x] that I've _made SirGouki test my code :stuck_out_tongue_closedeyes: since the last commit in the PR, and will test after any later commits

[SirGouki]

Other than my review, no problems. All 4 scripts work as expected now.