Don't argue with me, man, argue with the authors of the book  :P   I believe (but don't have the file with me so I can't confirm this) that there may be ways to reduce the Wizard's refresh cost by taking a disad or two.  Doing that with the CoG would also work...<br/><br/>But if you read the power levels, they only mention the CoG at the 10 point level, so I suspect they might not be able to reduce their cost thusly.  At a guess.<br/><br/>Either that or they screwed up big-time.