The stone golem type things are a little overpowered. Their attack is a little much and later in the game, they're practically the 2nd most threatening, with dragon at first.
You can easily kill all the side missions with bosses if you have one unit with freeze and another with poison. You can get freeze easily from snow giant(doesn't need much effort, just keep an on your units since his low attack might be ignored) and with freeze you can kill every side mission. Poison just speeds it up, you can get poison by refreshing the shop until a poison weapon comes up(ie; fish sword). A good unit to use would be the elephant(found from orca king).
Needs a super fastforward button for the side missions with huge ass bosses. They take forever to kill even if you have them on the ropes, the health is ridiculous.
Conclusion: Dinosaurs with hats can run on a treadmill dodging various dangers while partying at the same time. Great way to spend time and burn calories. :3