Looking at civilisation tree for the Kushites, I have spotted that the Blemmye Desert raiders are identical to normal javelin cavalry in stats. Their only difference is in the cost and loot if killed, therefore I am curious as to why such a mercenary unit exists; most players would definitely choose the normal cavalry to avoid the metal cost.  I have a suggestion: change the Blemmye desert raider to a mercenary cavalry archer. This would reflect the Kushites' heavy use of archers in battles