We all know specials arent balancable because you can kill one easy or afk target to kill a better one. Two players targetting one player with special will kill the target without using a single normal attack. One way to try to balance this is to add a "special blocking" ability. This ability would only block against special attacks and negate all damage. The mechanic would leave you immobilized for a few seconds leaving you vulnerable if you miscalculate your timing. Make use of that golden statue animation if you want..
The use of this block should be limited so you cant just spam it. You could have a special block meter that is filled by doing whatever the devs decide. I suggest having either a slowly recharging special block meter, or just using your own entire (or half) special attack meter to block. This adds more depth to the game while not completely removing the fun aspect of specials.