Hmmm... a.acuminata do pretty well in a dry environment. I've grown around 50 from pots of a.acuminata now (both phyllode variants). I've grown a.cyclops and a few others as well, and the only thing I've found with the ones that died was to do with the roots becoming root-bound.
Throughout recorded time and long before, trees have stood as sentinels, wise yet silent, patiently accumulating their rings while the storms of history have raged around them --The living wisdom of trees, Fred Hageneder