I wouldn't count on it, unless you know the correct people in the company.
Furthermore normally the other 5 -600 will go to EAT.
7 days at LEJ, flying during the night, so yes, you are every night at LEJ, although not very long...
You can not request DUB "overdays", as that route is used very much for positioning crews etc. But never say never...
There's at the moment still some flying at the weekend, but that will stop as more -600 join the DHL-fleet as they will take over the routes.
They do take dec captains, as they have no f/o's who qualify for upgrade.
(capt atr go f/o on the a300)
Anyway, in a nutshell, future for the a300 doesn't look that promising @ acl.
But then again, at that sort of companies everything can change quickly. Just finding the correct contract...