The general advice from our lot is that if you can get the ECAM squared away by 1000ft agl then continue the approach, if not then g/a and get it sorted out before another approach. One of the nice things about the Airbus way of doing single engine approaches is that there is no single engine landing checklist and the same flap setting is used, it means that as long as the a/c is under control and the initial items are done there is nothing to change.