I like the CDR idea on Zilean. But I don't honestly think he needs it all the way to the cap. I feel like Zilean should be more based around mobility, but this build is really great and yours looks like he can take a nice hit. I posted a Zilean build yesterday that after I looked at yours, was similar in a few ways, think you can give it a look? ^.^ and +1 for a very nice build

this build smells like awesome sauce
+1

Very powerful build. +1

awwsmm, in regards to your comment about not using Heal; I did put information saying that Zilean's support mechanism would be improved if Heal was taken on him. It only enhances what he can actually accomplish as a support. Although it primarily heals himself, it also pays off with other allies in range. That was my intent and I hope that you didn't take it as though I was just trying to keep myself alive in an egotistical manor. That's why I use it. I also now know that Tenacity doesn't stack, thanks for that. Thanks for the feedback though man. Keep commenting!!! :)

Lots of effort put in, +1. Maybe you should keep the gold per 5 item for longer but still good. I prefer not reling on Heal for a summoner spell because if feel that if you are careful enough it is not needed. +1

ADDITION: Tenacity effects do not stack, im saying this because you reccomend it in temporary items to build with mercury treads if there is too much CC, instead just reccomend Banshee's Veil. Or you could keep that and say you could use that with other boots. (and yes I read the guide!)

Nice guide :) Keep up the good work!

(Note: Persevereance is useless, it gives 1 hpORmp/5sec for every 25 hpORmp/5sec. It should be ignored for most champions)

(DoubleNote : Tenacity does not stack, and Merc threads has the best Tenacity)

wow dude thats prity fking great very indeapth definatly +1
ps if you could check out my kennen guide id be a great help on how to improve it