I guess today would be a good day to upload my videos. I'm going to edit this with links when they're uploaded. Anyways, if you like ranged and mage champions, the roles you're probably going to be playing are ADC (ranged marksman), and mid (either mages, or assassins)
ADC's: I recommend either Caitlyn or Vayne. To do good with Vayne, you need to be really good at positioning and mechanics.
Mages: Gragas (no real hardcore counter against him atm), Lux, Ziggs, Zed (not particularly a mage, but a really good mid)