As far as I can tell, there isn't that much you can do with the 5th cave to be more efficient. There are couple of places that you can improve your efficiency though. In general, you need to be trying to kill a roach every turn, not every other turn, as much as possible. This is pretty simple to do for the first cave, but you can accomplish it for some of the other caves too.
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×For cave #2, try to get Beethro up to (11,15) to kill the roaches. That way you can kill one per turn.
You can do something similar with the third chamber by standing at (11,14), but that one doesn't save you quite as many moves and isn't essential for solving the room.
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×For cave #4, try to have your sword pointing NE and jut in and out of the crumbly walls. That will lure out some of the roaches allowing you to kill them either in the narrow corridor
That should be enough to get you to the blob just in time. If you are still having difficulty let me know and I can post a demo.
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Links to neat forum tools that I always have trouble finding:
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[Last edited by Insoluble at 07-29-2018 08:41 PM]