Now that cpq2 gives very good exp (after being buffed not too long ago I believe), I'm trying to figure out which would be faster between the two. I have not gotten to 51 yet, but I am curious to know as I plan out the path for my f/p.
It really depends on your accuracy. Since INT gives accuracy, going Lukless and having good INT gear can give you enough accuracy to hit Jesters often enough that the exp can be quite good when using Poison Breath and dual channeling. I've never done CPQ2 and cannot attest to how efficient it is, but if its its anything like CPQ1, partying with randoms can be tedious.