If there's any good in Kodachi's guide, it's the emphasis on the longer swirlie time and 65% fcr

tactics more than equipment (.08 Valk ? highly unrealistic). Those 2 things were staples for the .09 sins and the sooner you master putting opponents into stun-recovery animation, the easier your life is going to be against max fcr casters.
DF is way too buggy to rely upon exclusively. First, DF is interruptible. Second, desynch causes way too much wiffing against high fcr casters. Third, Bone Prison/IM is a scary situation. Fourth, the SM casting delay is dangerous. Fifth, Blizz nerfed DFs' range noticeably. With all that said, I'd rather have a Bramble then Enigma.
The bad point: you'll be out of mana quickly if you try to out tele a caster. Also, Kodachi seems to exaggerate about killing hammerdins with high MB alone. Hope you have 16 rows of blue pots

Plus, they can Charge out of stun-lock, assuming they know what they're doing. Also, the WWsin's losing a lot of poison damage w/o Bramble or even Nat's. But as long as OW procs, and the caster doesn't pot, you can watch them die a slow death

.