I kinda want to level 3 of them and let them battle it out, all that exp... Issue is they will follow and attack each other before they can get to the max level. --- You want to fly on a magic carpet to see the king of the potato people and plead for your freedom, and your telling me your completely sane?!
Don't kill any enemies when there is a Goliath in the area seems to work for me, although I've only seen 1 at Rank 4 in the firehawk area. (He kicked my ass a few times, his rage was quite funny though)