To get to the green dragon shop, enter 1000 rivers via magic valley in your boat, go to the second place where you can land on the mainland. There should be a beach with a path that turns generally right. Follow it, the shop is at the end of the path. I hope that's clear enough.
As for elves/hunters and cannoneers, hunters are far better than them whereas elves are about the same or slightly worse. The big difference is the no range penalty and the ability to use dragon arrows. Having no giants in your army will also make your green dragons stronger since their morale will go back to normal instead of being at -2 (so they will gain back the 20% attack and defense that they lost as well as getting a critical twice as often).
|