That idea wouldn't fly by Bungie or the rest of the comunity. The idea is that there needs to be balance, or something to sacrifice in return for the damage. 6x damage means that you only have one chance to hit the enemy, so a 2x damage perk would likely make it only have 2 shots (which evens out with the Achlyophage Symbiote helmet already). As for a 9x multiplier, there would have to be a ridiculous reduction in charge time and accuracy. It would take twice as long to charge your super, effectively negating the damage bonus. The configuration of the helmet as it currently stands is, in my opinion, the best reasonable configuration that has been suggested as of now.

I can understand that and seems reasonably easy for them to do. I wonder how many orbs one shot will make