So glad to hear that my friend! We look forward to working with you more, and awesome to hear that you're enjoying the content!
So the only difference between a 2 stroke Moeller, and a 3 stroke Moeller would be the "tap" that you play in the middle of the 3 stroke. It's one extra note, in the middle of the "wave" motion, which has less motion that the 1st or the 3rd note. (That's why we refer to it as a "tap" and not part of the "whip.")
As far as choosing a technique to play triplets... I wouldn't worry about this too much! There are certainly some scenarios where this could be a helpful way to think about it, but overall, I would not marry together the idea of subdivision and technique. There are too many variables to be overly concerned with this.
It's also important to remember that ALL techniques CAN be used to play almost anything. You can play 3 strokes with American, German, French, or Traditional Grips. The technique that you choose will come down to style, power, speed, and dynamic preferences.
3 loud strokes? Use wrists.
3 fast and quiet strokes? Use fingers.
3 strokes repeating? Use Moeller.
In my eyes, the ultimate goal is to have all techniques flowing together; so there is very little thought happening when you move from one technique to another. This comes with time, but the end result means that you don't have to put much attention on what technique is being used to play certain parts. Sometimes this happens, but it's very rare!
So with that said, my best advice here is to try all techniques in playing triplets, and allow yourself to naturally move towards what feels right! Let me know if this makes sense!