From my own informal polling of other waterskiiers in terminals and cockpits, date of hire is perfectly acceptable to most of us. I hate the pseudo-scabs as much as anyone else, but if DOH is what it takes to merge the lists. Do it.
(They can even have a fence for a year or two so they don't immediately get flushed from their shiny CRJs)
Otherwise, we should just strike and let them become real scabs.