That level is nasty, true. You need to jump through the bomb changers, throw a blue bomb and get the timing right so it hits a bobble below. A bit tricky, but you won't die to the fireball. Rather to a bobble eating you

Usually I start with white bombs to kill one or two of them in a quick and easy way, then I stand in the middle and wait for the rest to come close. Also, I like to freeze them in one of the wells right and left of the middle. When they start moving again, they might go in your direction and you can use the trick above.
Another option is waiting for a wonder. Like

, which is incredibly good there as it also lets you skip the next level...