I think I'm going to make 59/60 required and leave a few different solutions available. I almost have to, I don't wanna make any real drastic changes to the layout. I want it to look fairly neat and simple at first. the feedback was very helpful.
After that I think I'm going to leave it as is for now at least. Proxima's second solution is good enough. (it would do away with my own solution but I used a similar miner trick on my last level anyway). Steve's solution is still possible but I don't think many people will see that (at least not before the other solutions)
However, Steve's solution is savagely genius enough that I may make two version of this level.
Either that or I'll make another level using that trick. (Unless you plan to)
I didn't bother to upload it since all that needs changing is the required #. Just change the # to 59/60 (if you add this one to the list).
I like Endeavor. I haven't solved it after a few minutes yet so it's not extremely easy.
EDIT: ignore the edit
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I've noticed that in many of the cases, having more skills or a variety and simpler landscape makes a more difficult level. The key is to have many options available while most are red herrings. (making a person go down the wrong line of thinking which can be hard to get out of). But that's just what I've observed.