Kafka and Serval Shock Tech with Ruan Mei and Freeze

TLDW: 3 shock DoT Procs for 4 seperate DoT shocks (if you have PAYN) before the enemy can take an action
Strat Requirements: Serval, Kafka, Ruan Mei, and a character who can freeze. PAYN preferred to get the most juice out of it but not necessary.
Here's a little something I cooked up that might give you a reason to run Serval and Kafka together against lightning weakness.
This strat makes use of Serval's niche of being able to extend the Shock weakness break as well as Erode from Kafka S1 (aka PAYN) being coded as a shock. It involves chaining Ruan Mei's weakness delay with freezing the enemy to have them proc the shock DoT thrice before they take their next action.
Is this actually useful or practical? I don't know. My units aren't built very well in the video, so I could showcase everything before the cycle blessing kills them. I also lost the 75/25 on PAYN so I can't showcase it here. I did test it in a calyx with a support Kafka and Serval can indeed extend Erode to a 3 turn duration to get all three tics from the strat. (edited)
You should be able to use this DoT tech (Ruan Mei + freeze) on any 3 turn DoT, but Serval has her own niche of extending the break shock DoT to past 3 turns. Kafka's shock only last 2 turns so she needs Serval to extend it for all 3 procs. Guinaifen's DoT only last 2 turns and she has no extender like Serval. I imagine using this with Luka or Sampo instead of Serval could be pretty powerful regardless, but I do not have any other DoT units built at the moment.