At this point you are probably quite skilled with bankshots already, so the best strategy for the lower part of level 136 is to drop the other row of Doom Skull Bubbles the first thing you do. Then you have a really wide selection of clusters to pop! I prefer to clear out the left side of level 136 first, sionce the trhree in the background gives me better marks for adjusting my aim for the bankshots. But the reality is that we seldom have the luxury to choose.
Getting to the ceiling is not the most easy part, the black bubbles attached to the ceiling are really messing things up for the player. But luckily we can stop the countdown for a Bomb Bubble easily if the other side is still covered. Look at the picture for spot where you can actually use a ball from the cauldron to stop a Bomb. This way we can shoot some hole in the ceiling, then stop the Bomb and shoot another hole! This gives us the time to use all our Bubbles from the Cauldron!
Video walkthrough by skilllgaming