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Kill all but the lowest two nests. Then clear the skippers by lining yourself up with the mimic. Let a skipper reach the eastern row, then move as far east as you can; this will let the mimic get west of the nest, allowing you to adjust.

Now clear all skippers, and then this is the process for putting distance between you and the mimic:
-The turn after spawn, you want to be 2E of the nest with the skipper dead
-NW, W, W, SE - mimic moves south, increasing distance. Now move back to where you were to kill the next skipper. You should be able to kill the skipper from the other nest in this process.
-When you have enough horizontal distance, go S of the nest, move up once, and kill the nest. This will let you get S of the other nest while still being able to kill the skippers it lets out along the way.

×Only leave the nests at (17,18) and (10,20) before going for the swarm. Again, move the mimic west of a waterskipper at the shore and then move to the rightmost wall for alignment.

This leaves you one short of getting west of the (10,20) nest. So, after clearing out the whole swarm use a diagonal movement to adjust by one at the (17,18) nest and then kill it. Timing is tight to take it out before you have a waterskipper you can't deal with, but only having to adjust position once helps a lot.

Now your goal is to use the (17,18) nest to adjust your position until you can reach the bomb. Again, use diagonal moves on the west to adjust horizontally. You should have a turn to spare to adjust vertically while going around to kill its skipper again; with no other nests in the way, this isn't too hard. Once you have enough room to get to the bomb, kill the nest and make your way there.