Organic groups, group content types and pathauto
I tried:

[node:og-group-ref:url:relative]/[node:menu-link:parent]/[node:title]


Worked like a charm.

So, I guess that you should go with:

[node:og-group-ref:url:relative]/[node:content-type]/[node:title]


Note:
Posted the answer since this was the first result on Google (for me), and no answer was given... Perhaps it will put someone else in the right direction faster.