The attack range and speed of this character are a little overboard. The flail is pretty long for what it should be but ( not trying to be realistic) it may as well be a whip considering its length and speed. If the length were to be the same then the attack speed should be brought back a bit because as of right now its practically on par with the Orchis attack speed. Either one of these aspects could be toned down a bit and i feel that would bring the conqueror into check.
tbh I don't think their range is as good as you say, but I didn't get to fight a lot of them.
Also I find their attack speed just right, I never got chained for more than 2-3 hits. You need to know that once he has attacked from one side, he'll obviously attack from one f the 2 others. Not just because it's the smart thing to do to mix up the opponent, but because they can't attack in the same direction twice.
Anyway, I'm fine with how he is right now.