Talk:Kennen/@comment-108.226.14.5-20130312194547/@comment-37.201.144.15-20130317001036

Just some recent experience with Kennen on Twisted Treeline vs. AD opponents:

I used to build Frozen Heart as my 6th item due to AS-debuff (ASAD) and 20% CDR. I know I wasted 400 Mana on that item but given the situation it worked pretty well and I didn't have any energy problems at all during that time because there wasn't much poke going on (all-in champs). Your ult+passive usually give enough energy to make up for anything you do with e/w/q. However, this will likely not apply to Summoners Rift or a static lane in general.

If you have energy problems with 40% CDR then the CDR stat is not useful for you. Better not use/buy it all at than having energy runes to make up for the CDR problem.