Starting Bubbles: 55
Recommended Potions: All you can spare. But train a few lives before letting the Potions kick in, as you need to get used to this level a bit before you can clear it.
Points needed for 1, 2, 3 Star: 70 000, 85 000, 100 000
Doom Skull Bubbles
3 Bomb Bubbles
Keep you head calm and work your way to drop one side with the skulls first. You probably will have to set the lower Bombs off and then plug them again. Before you have dropped the lowest skulls, you will not be able to see the Bomb in the middle, so think about not bursting anything that can set that middle Bomb off!
After dropping one side of the skulls, you can use bankshots to reach a bit better to drop the other side. But the banking is usually just a bonus, it feels safer to drop both sides the same way.
After the sides are dropped think through your bursts and try to drop the bombs from above them. The middle Bomb can be left as is and dropped with the ceiling.
Here is a 3 Star video, no Charms, for EI 15-4.