Shifter Lines 105: Is it Faster to Use the Phistomefel Ring?

This video is a repeat solve of https://youtu.be/u7dAXJDxojg

If you've not seen the original video, I'd encourage you to watch that first, at least for the rulesets if nothing else.

Continue with this video if you'd like to see how the Phistomefel Ring helps the solve immensely though!

Rules:

Normal Sudoku rules apply. Place the digits 1 through 9 in each empty cell. Digits must not repeat within the same row, column, or box.

Shifter lines: Adjacent digits within the same box on a shifter line share both parity (even/odd) AND polarity (low/high). Whenever the line enters a new box either the parity OR the polarity shifts, never both. Shifter lines can never have 5 on it. Digits may repeat on lines.

Kropki dots: A black dot between cells indicates cell values with a 2:1 ratio. A white dot between cells indicates cells with consecutive values. Not all dots are shown.

XV: Adjacent cells connected with an X must sum to 10. Adjacent cells connected with a V must sum to 5. Not all X's or V's are shown.

Even/Odd: Cells with a filled square must be even. Cells with a filled circle must be odd.