This is my Swain build. *Note only use your Ignite when enemy champions are running away and have low Health. What you want is a very early Rod of Ages. Also when you get Deathfire Grasp, use it's active as an Ignite. When you go against enemy champions use your E (*Note if you miss the E then don't do the rest and just farm nearby minions and harass until E is back*) then Q and then R then W when they run. They can't move, you then slows them and your R will life steal him/her and other enemies near by then your W will be able to finish them off (works kind of as ignite but with AP). If they run with some HP left then use Ignite and/or Deathfire. If you think you can't kill him/her then don't waste Ignite and/or Deathfire. ONLY LAST HIT MINIONS IN EARLY GAME!