I think Syclar should NOT have Mountaineer. I have read many people's posts regarding adult Syclant bringing food for baby Syclar. Those Syclar are stuck in caves. So it follows that they aren't Mountaineers. Else they would get their own food, instead of relying on their parents.
I think Illuminate makes a lot of sense, as the tail of Syclar looks like a gemstone or ice block which could easily be used to generate/disperse/diffract light. Given the idea of Syclar being stuck in caves, a light source would be very helpful, so Illuminate.
So I think Compoundeyes and Illuminate, sticking with the theme of Syclar being cave dwellers who rely on Mountaineer Syclant to fetch food.
Alternatively, Shield Dust would also be acceptable to me, as the dust in caves could theoretically act as a shield.
*note: I'm not saying that officially Syclar have to live in caves, that's just how I think if them, and as such I recommend Compoundeyes + one of Illuminate or Shield Dust. Definitely Illuminate first, then shield dust.
Just A1 for short. Apparenlty people can't spell Treadshot.
Recent Scramble link
Note: Yes, it is spelt wrong. Deliberately. Shut up, you're not the first to notice.