I personally think of Koalefants as inefficient. Not that the time taken to find and kill a Koalefant plus the risk of getting hit, getting Ewecus etc. is a bad trade-off, but rather because it's too good. That is, 8 meat and one trunk plus all the other stuff I collect on my travels will make me more food than I need. Considering the time spent tracking the Koalefant + the risks involved I would rather explore in exactly the direction I want to and be able to collect stuff without worrying about the track disappearing. The easiest way to show this is the fact that the only characters I hunt a Koalefant with are Wes and Wolfgang. I played a server today where I was Wolfgang, and used the stuff from a Koalefant + other things I found to make enough meaty stews and meatballs so that I could be Mighty form while searching for a place to set up base, and it was just about right. Considering Wolfgang's hunger drain that means I would have had way too much food as anyone else.