Okay, maybe here are some intermediate goals you'd find useful:
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×Get SE goblin at the center as well
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×Kill SW gobin at SE trapdoor
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×Kill NW goblin at SW trapdoor
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×Kill NE goblin at NW trapdoor, or lure one of the center goblin to kill at NW trapdoor
As for tricks to juggle the goblin around the center,
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×It's very specific, but if you make the two follow you without any separation between each other in one of the 1-tile walls you can then get both goblins on your tail with 1 tile separation between you and the goblin, which then you can stop the goblin at the other 1-tile wall.
[Last edited by uncopy2002 at 11-17-2016 07:58 AM]