The trick to obtaining this achievement is to have many orbs in the upper right and left corners and some in the middle of the screen. Then you just need to bounce the beam off any orb you want to lower each number on all the orbs one at a time. Then if you need a different angle ; position the laser to the side of another orb and find three orbs clustered together so It can bounce evenly on each one. This will get you massive chain combos , just hit one or more of the huge orbs and its radius will blast out many others. Rinse and repeat with doing combos and once the multiplier reaches 200 you nab the achievement.