I did Bismarck Ex yesterday and I got an average DPS of 460 (+80 from the turret). I m ilvl 154 with an 160 weapon.

Now, my questions are:
1. How much DPS should I m make with ilvl 160 or ilvl 170?
2. Is there any kind of best-in-slot-gear out there or are you aiming for max ilvl?
3. With the "fix" of rapid-fire: are you attaching GB during boss-fights or do you keep this thing off?
4. What can i do, if no skill want to proc, but both ammunition-skils are not ready?