Currently, Bandito is available only on single content items in a flex feature or block. However, this excludes collection-powered regions from using multivariate testing. By implementing Bandito Light functionality within the websked collection UI, where you could add mutliple photos/headlines for testing, you could expand this feature. You also could, in theory, allow for easier transition between positions. The multivariate test would have to restart if its position were moved, but you could accomplish this without manually wiring it up again.