I love the challenge of this fight. It took me two groups to clear it, as my first group wimped out and abandoned the duty after a couple wipes. The issues the two groups seemed to both have was low DPS on the add phase. The strategy that worked best was to focus down the Shadow Dragon and avoid his cleave at all costs, as that damage down debuff makes it hard to beat the DPS check. After that, it's just dodging AOEs and making sure to stay stacked until he finishes hitting the group.
I REALLY hope they don't nerf this fight, as it has me very interested in doing the EX version and even giving Midas Savage a try via Raid Finder (though that should be an "interesting" experience).