There are many opinions, you can find a lot here:
SS31 THREAD
The protocol I have used a few times calls for 5mg SS31 5/2 for 4 weeks than overlap a few weeks with MOTS-C before stopping SS31.
There are those who believe the dosage is too small at 5mg or that the pep is too expensive to use a high enough dose.
I am satisfied with the cycle and "feel" it may have benefitted my long term strategy of optimizing all supplement/peps I use.
Take a look at that thread and I believe
@Calm Logic has posted a great deal about this stack as well.
I am currently on the overlap portion of mots on second cycle of ss31/mots and "feel" it was worth the investment on a risk/reward comparison.
I also cut my food budget down by $400+ per month, so ss31 is now my door dash mad money..lol