User blog comment:Pianodud777/A Champion that can do it all?/@comment-2112140-20130710165105/@comment-6061249-20130711014327

Jayce can work well as support. Only problem is as you mentioned, mana hunger. Get Tear as soon as possible, mana regen runes would be okay. In late game, Muramana's effect maybe would give him some damage, even if built into hard support.

His abilities pretty much match support's position. You just need to do it once. Movement boost for both you and your ADC, slow, some additional damage (which is actually insane in early game even if supporting), and then knockback. I don't think that it's possible to flash out of this after teh hammer punch. Awesome, until mana is above 0.