Brand is not a support, not even as a secondary. People play his as a support because of his cheap spammable Q poke and passive, but otherwise he has the ratios and scale factor of a mage, so his burst is on par with an ADC because he is a mage. The problem with picking him is it is very difficult to setup kills with him because he does not possess an easy initiation effect, thus playing him effectively requires pinpoint accuracy and a lot of careful planning until you get
.
People play mages as a support because certain ahem CHAMPIONS (
) have pushed them out of mid lane, so they go support in an attempt to balance the teams damage sources so they're not pure AD. Its not an ideal setup and more often than not its very risky because you don't have the tools to guard your teammate effectively or set up kills and make plays. Also a mage requires quite a bit of gold so they either need a ton of farm or for their teammate to get fed in order to get the gold they need. It works fairly well at lower rankings because people a lot more.
Gold income works pretty well, but I would like to see them buff gold income so you get as much gold as an ADC with say
set, if you use it well. This would further reward a good support with lots of gold and therefore lots of carry potential.