I went against Jayce in one game and against Kassadin in the other.
Against Jayce I picked my ap vs ad runes (9 hybrid reds, 2 quints of armor and 1 quint of health, 9 seals of health, 5 ap blues, 4 ap/lvl blues.
stats). My usual start of dorans ring + 2 pots. > dfg > sorcerer/zhonyas > void staff.
Against Kassadin dfg > sorcerer.
Although, even if I was 8/0/8 and 3/1/10, I mostly won the games because of my team, good calls.
I would have bought chalice if I had to play against Syndra, or something. I would still get dfg, probably.
It really helped I was banning. No LeBlanc and no morgana, so happy.