Level 4996 Candy Crush Saga is classified as a nightmarishly hard level so you can expect to lose a few lives before you manage to pass it. I have tried it.
try to destroy the jelly block at the top, so that it helps the booster out.
the more candy wrappers and strip candy comes out the easier it is to destroy blocks and Jelly.
The best combo to make is a double colourbomb combo and you will likely need more than one of these to have any effect on the thick blockers and crystal candies, Another combo that might help to break the blockers on the left is a colourbomb wrap, but this won't help with the bottom right corner which has no candies in it. and this video from youtube as a reference https://youtu.be/IJbndBqRO1g?t=87 Good Luck , you can do it my friends