(This is probably a question best asked in an electrolysis school, but here it goes.)
First, I have to thank Dee for mentioning using multiplex for deeply rooted hairs. I tried it and have been delighted with the results, it really loosens tough hair, especially hair on the knees and around/on the feet. I used the same settings I use for microflash thermolysis; 5 pulses and 99% hf but more than halved the treatment time (0.028s instead of 0.062s for the knees for example.) The hair comes out with one treatment per follicle, and the skin looks great afterward, though multiplex does feel just a tiny bit more painful than microflash.
My question is, are there situations where microflash works better and multiplex should not be used, or are microflash and multiplex largely interchangeable? They are so similar in terms of time required and skill required to use them, I can’t see any reason not to just use multiplex instead of microflash.