User blog comment:BerryBandit/Mechanically demanding champions/Quick decision champions/@comment-4837317-20130624195531

1.cassiopeia, sucks if you cant land q's but if you can you easily can make a few kills.

2.leblanc, need right positioning for e and you need to be able to juke the right way.

3.zyra, that ult just has such a long time till it knocks up and overall you need really good placements of your seeds and choose which plants you will grow

4.zed, you need to be able to combine your skills and bork at the right time in order to instantly blow someone up, if you do it to slow you might even die since youre quite a glasscannon

5.lee sin, landing q's and ward-w-ing

6.vayne, that condemn is sometimes so hard to pull off, also you should be good at juking with your tumble during your ultimate...

I guess these would be very demanding champions, not in a particular order...