I am still finding the 3k a night Empress grind to be a good one even at 71. In Tree on Steelshells. Now that some of the crabs are T vs VT I know which ones I can fight on the 2nd pet and which I can fight on the 3rd!
Once again I tried Ifrits. It wasn't bad but I found at 71 I would clear some of the bomb tunnels quickly and then I'd run around for something to kill. The bats are DC-EM which is nice but the xp doesn't seem to match Tree even with the chains.
I'm looking forward to Sky and Bibiki to finish out my quest to 75 :)