The thing is you can't do proper layovers with budget airlines. Those third-party sites that try to make it happen are incredibly dodgy and if something goes wrong they have no legal obligation to offer proper rebooking since they are not required (and usually don't) have any sort of partnership with any of the airlines.

If I wanted to make a connection with a budget airline I would always allocate at least one night at the intermediary stop since you need to leave the duty-free area anyways, just in case something goes wrong. It's just not worth the risk.