just take care to use your combos right(Q->R->W->E)
don't be too aggressive or waste mana in the beginning
use your ignite to gain ap while it is in cooldown ....otherwise put the ignite mastery point the last of utility tree (cd reduction)

the idea isto make a good start, having as much ap power as you can that 's why i puth that mastery point on ignite

if you deal with snares and stun buy a mooflair spellblade after the boots