Huh, looks pretty good, and very Dominionesque in spirit !
Can I have one please (drop me a pm) ?
As for the new pretender, I find the Raven very weak- he lacks all slots except misc, has few hp... He could have a smaller path cost (20-30 for example) plus another boost somewhere (gem generation, whatever..).
The Pole is nice but lacks focus - I mean he has 3 paths but other are costly (so not rainbow), and making any path high would be costly also because they start at 1.
What about adding 1 level (where it's most thematic - dunno where
) and reducing path cost to 40 ? Also he could have 3 or 4 misc like Oracle.