The nice thing about EI 13-3 is that you can see all the Bombs right from the start of the level. The crystals on the other hand makes it quite easy to think ahead so that you can clear out a lot of bubbles around the Bombs before you have to let the countdown for a bomb begin.
It doesn’t really mater in what order you take down the Bombs and the upper Bomb doesn’t even need to be dealt with at all. In the video I have gone straight up, right for the middle Bomb, but that indeed is a strategy with a lot of luck involved. The safe way to guarantee yourself an at least one star score is to shoot as many Bubbles under the Bombs before letting any of them start the countdown(See picture attached to this guide).
Don’t waste any Rainbow Bubble before you have some Bomb countdown to deal with.
But here is the Bold Video for Eternal Isles 13-3 anyway! Stupid strategies sometimes make good videos, LOLs. ;-)