The simple solution is to take them in the order that they were awarded the cadetship in the first place, no one will want to hang around Qlink after it starts anyway. Qlink have to man up and realise that crew turnover and training a part of being in this industry and the fact is, after 10 or so years, most are ready to move on. Opportunities abound worldwide for the willing and I don't see that changing any time soon.
SN