4-MMC Frequency

My girlfriend and I have been doing MDMA every 3 months per the golden rule, she has never used drugs of any kind before meeting me so we've started slow, she's done it probably about 10 times over the last 3 years and now I want to introduce her to 4-MMC a chemical I've done only once before myself but have read about extensively beforehand.

I'm assuming we're going to love it and it will become a frequent thing for us, however my question is can I interlace it with molly like halfway between sessions and still do the molly? I know there isn't much literature on this but I read a paper (lost it actually so if anyone knows what I'm talking about help me out) that says 4-MMC doesn't have neurotoxic metabolites and thus is far safer to use more frequently than MDMA, which also explains why people can do it for days at a time which is virtually impossible with MDMA

Am I naive for thinking I can use this say every 6 weeks then 6 weeks later do Molly or some combination there of? Should I only be doing 4-MMC every 3 months as well? I don't want to choose between MDMA and 4-MMC and doing the 3 month rule means I only get to do each twice a year. I want to be safe but I also want to party lol. What y'all think?