Currently, Funnel supports the following Doubleclick Campaign Manager report types:
• Standard
• Floodlight
• Path to Conversion
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​Reach and Cross-Dimension Reach reports are currently not supported by Funnel.
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You can include any dimension or metric you want (except reach, ratings and percentage metrics) as long as it's available in a supported report type. Read more about how to create a custom report and make sure it works with Funnel here.

For the metric Paid Search Average Position you will also need the metric Paid Search Impressions included in the report.
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See also: Googles help articles on the Report Builder