A question regarding mage secondary roles.
So I happened to be admiring some new skin splash art, syndra in particular, my eye wandered over to the name plate and I see that her secondary role is "support". My first reaction was WTF... then I thought about it and could see it being done. Out of curiosity I scrolled through all the mages on the roster to see who else has the secondary of support. I was somewhat surprised at what I found, champions I couldn't even see as a support had it while ones I expected to have it didn't. What is the reasoning for giving the secondary of support to someone like syndra and not someone like ziggs?