Should I stack up on mr early on to deal with the harras or just ignore and go for his core items IBG and SV? --- Going to church doesn't make you a Christian any more than standing in a garage makes you a car.
Rush spirit visage and mercs. Afterwards, she's one of the few who's still very much a threat after buying one major defense item, so getting some extra sustain through Warmogs or Shurelia's is often a good idea. --- Nothing to see here, move along.
Don't just rush MR if she's cs'ing well since she'll probably build sorc shoes into haunting guise. Grab a kindlegem and then build that into a SV.
Dumb. She's simply stacking flat penetration, not percentage. Just get MR. Getting Kindlegem won't help against her Q. You'll want SV anyway, don't get me wrong, but it's better to get the Negatron Cloak first. --- LoL EU West: Sabrewylf