To Zophia:
To make the 5,6,7 and 8 combos just hit a Clutter let the babies grow, hit them again, and let them all stuck on you. Then shake them off, by moving the cursor up and down, and swing your sword. You should kill more than 8. I suggest you try that after you have the Raizor Glaive reward, because it has a much bigger swing arc and you can hit more Glooples at the same time. The Unbelievable Combo was the Last Award I got! And for the Void Eater just go to bounty run mode press "slow" and then wait for them to bump against each other. You can use the Instant Wall Reward as well, so that the more Glooples stay on the screen. And you can also let them bump on you and change their directions, so that they bump in each other