Talk:VPBE/@comment-1920550-20150421080422/@comment-26315220-20150422095314

If you build together with  you are going to shred 18.33% more armor because the penetration and the reduction stack multiplicatively. And that is after you stack all 6 stacks. It really isn't as much as you might think it is and it takes time to ramp up. Also if you have to switch targets you have to start the process all over again.

Jinx and Cait wouldn't benefit from 20% CDR in an actual teamfight because casting their spells regurally (as they come off CD) would lower their DPS in a teamfight (in most cases). Graves and Lucian's have a short cast time and would benefit from CDR. Tristana's cooldowns are longlish and you probably cannot expect to cast them more than once or twice per a standard teamfight lenght.

This movement speed is halved for ranged champions. So the first part of the passive gives you only 10 MS while the second one 40 MS. If you really want MS Furor gives 12% MS (12% MS on a average ADC with tier 2 boots is 45 MS) in basically same circumstances.

has 80 AD and 35 MR (630 effective health against magic damage). has 25 AD, 10% lifesteal, 40% AS, 8% current health damage, 10% max damage active and heal and MS steal. with 50 Armor and MR gives an average ADC with 1800 health 900 effective health against both damage types. This is not taking into account various penetration options enemy champions can have. If you take those into account you end up with less than 900 effective health.

These are all examples of items that must compete against and I think it will fall short on many champions. Not because it's bad or anything but because you have 6 item slots and there are simply better options for all of those.

It should be looked at for every champion especially but sans I don't think there is a clear cut candidate for it.