In our K2 for SharePoint workflow, we have 2 concurrent paths with user tasks that need to be completed before merging back together to complete the workflow. What is the best way to have the workflow wait until both parallel paths are completed before executing the step where the paths merge back together?

I've seen references to "preceding rules" to check a condition before executing a workflow step, but I'm not that is available in K2 for SharePoint?

Any help is much appreciated.