Starting Bubbles: 35
Recommended Potions: Rainbow Bubbles and +3 Holes in the ceiling (tested for 2 Stars)
Points needed for 1, 2, 3 Star: 85 000, 110 000, 130 000
At Eternal Isles you need to focus on just one single bubble. It is the the black bubble in the second row from the bottom. Clear out this black bubble or clear the bubbles above it and you are safe from the infection, as you can see the ceiling very soon after clearing the lowest row. Bank bubbles off the wall to get the ceiling to drop.