I'm currently planning on playing on release. Ill be playing an average of 8-13 Hours daily. Just looking for someone that got far in CB to fill me in on some stuff, As in the quickest way of leveling, Questing/Grinding? At?
No, it is better to level them at the same time. Unless you want to just grind your secondary after your primary is 50 since you won't have any more quests... Of course, this might change when they add more zones (so far the map is only 25% complete).
You can't use skills from your other class that are higher lvl than your current class, btw. For example, say you have a 50 Mage / 1 Priest. When you switch to Priest, it will be 1 Priest / 1 Mage.
I'm not sure what the req for guild creation was, I think it was 100,000 gold but it may change in open beta. At level 25 I had 300,000 gold.
There wasn't much PvP going on during closed beta except for duels. I played on the PvE server so I can't comment on open world PvP. They will be implementing guild vs. guild, arenas, and server vs. server.