First, is that the whole sentence? The ... at the end is used to signify that the sentence continues.
Either way, even if that is the whole sentence, I would put a comma after which. Why?
- There is a natural pause before which,
- Which introduces a non-restrictive relative clause; these are often preceded by a comma,
- The sentence up until which is quite a mouthful to say.
So, now, you have two answers, 1 for the comma, and 1 against. Thus, it is not really a "rule" of linguistics that matters, but making the sentence easy for the reader to read. In one sense, it comes down to opinion, either the people here on stack exchange, or the people over at different English learning websites, or your own. Which I think is most important, as you develop confidence in your English writing skills.
As for me, I do not like commas that much, and they can be overused, but I couldn't see myself writing that sentence without a comma (even if that is the whole sentence). I owe it to my readers to be able to come up for air after the mouthy introductory clause, and a comma is natural before a non-restrictive relative clause, especially one introduced by which.
Here is a good link about comma use in general. Here is a link about restrictive and non-restrictive clauses.