User blog comment:C4bal/Corki in the Tank Meta. How to./@comment-4091261-20150613214922

I agree and disagree with this simultaneously. I like the and  for champions that really do not need the  component on. One example is,. Due to his major dependence on spellcasting for damage, the cdr from IBG is much more important than the crit and attack speed from. In case, it's not quite the same. may utilize spells to amp his damage, but his main damage source is still through autoattacks--without a shadow of doubt. So I still believe and  is the superior choice in general. Although, that's IN GENERAL.

If tanks become the severe issue, ex. they are more fed than the carries on the enemy team. Then by all means, switch to an and a. There is no question that the armor shredding is more valuable than the armor penetration in the case that the whole team needs to deal with the enemy tanks. So despite being better for  alone, sometimes it is more important to make a sacrifice in power for the whole team to achieve victory. Although, if the carries on the enemy team are still a major threat, (incuding mages and assassins as well) then I would say to stick with the and the  as the main sacrifice for going with the  and  is the lack of damage against squishier targets.