score:3
Straight from ANNEX II of Visa Code:
- for journeys undertaken for the purposes of tourism or for private reasons:
...
(b) documents relating to the itinerary:
— confirmation of the booking of an organised trip or any other appropriate document indicating the envisaged travel plans,
— in the case of transit: visa or other entry permit for the third country of destination; tickets for onward journey;
So the actual e-ticket is not required, and booking confirmation should be enough - as long as it indicates your travel plans. However if you already have an issued e-tickets which state your itinerary, they can serve as such indeed.