User blog comment:Mineko Charat Lucky/Stop Telling Me What to Build, Thanks/@comment-4057638-20131013234410

teamwork > yourself

Stop being a selfish player. Build what you want after what your team wants. In case one, if the team did not ahve a lot of AP dmg (jax excluded, technically not full Ap champ), you should follow what they have. Zhonyas is almos must-have on all mage champions and can defend as well.

Case 2 probably eneded tank