Thats a very good question. I would say that both pilots as the FE can be operated without. Think all they do at these stages of the flight is set the power ? Safety wise i would say that two pilots would be better than one pilot and a fe. If you lost the only pilot things would go belly up. Be interested to hear other views on this ?
Liverpools rwy is 7500FT long. Easy long enough to handle an A310. The airport can also handle larger than that. This A330 brought the Liverpool fans home from Istanbul last year.