[Warning]: cron Task(s) exceed time threshold

[joebordes]

the error message give you the clues you need to not have to test them all. For example

Accounts->save

says that the workflow is associated with accounts, so you only have to look in the workflows related to accounts module

Workflow->performTasks('12')

says that the task has id 12, so you can go to the com_vtiger_workflow_tasks table, look for the row with ID 12 and find the ID of the workflow.