Well, I can see the difference between a bleach - fix and a blix. Sorry, but then whatever makes you happy is ok.

As for using powdered kits - don't. The films need ammonium thiosulfate to fix out the silver salts properly and in a reasonable time.

I say the blix "may" work because the reaction goes to completion (sometimes) and a long blix can remove most all silver in some cases. Fast films are harder to blix than slow films for example, or high iodide films are hard to blix. The argument comes from addenda and iodide in films that prevent blixing from going efficiently. In some films, the color droplets surround silver metal and protect them from blix but the bleach can get through more easily.