If it was a forced fight I would understand the complaint. Afaik there isn't even any kind of quest that requires you to beat them. Optional fights should be challenging. Also, I found it very exciting to encounter such a crazy foe. Would be boring if all enemies just kindly behave in some expected manner. The fight catches you off guard which is really cool.
As for needing to cheese it: no. Unless your party just isn't cut out for combat, it's perfectly manageable without barrels, surfaces, causing them to fall to death etc. You do want to be LV4 and have decent equipment, which I think is reasonable considering it's the endgame area of EA
