I tried Consulate Docks on Hard Mode with my monk as a bonder, using two hero healers and the rest hench/hero. Mission was easy up to the ele boss in the middle, who with one Meteor destroyed six of eight members of the party despite all of them being bonded; essentially meaning it did enough damage to kill them twice over. Only Dunkoro and I survived, because I had additional protections on me and wasn't in range and Dunkoro because he had 630 health. It certainly showed the power of ele bosses in HM.
Some nice tips listed guys.

One I would say is to use flags effectively, just like in normal mode, if you're using heroes and henchmen. Use flags to make heroes kite or run if they don't automatically, use them for tactical positioning to spread out to avoid AoE damage. My most recent use of them was to dump to Meteor Showers on a group of 14 or so Kournans in Gandara (11 were casters or archers) by flagging Zhed and Sousuke just out of range and protting them. They'd wiped us three times before that without us getting a kill (embarrassing...) but all 11 died then. The guards were then easy.
I haven't used particularly special builds so far, just been cautious and took things slow and carefully. Haven't managed to fail any so far, though two areas have been close.