Crit dmg, especially for dual wielders, is extremely easy to max. I can max my crit dmg without a single point into the KP, although currently I have 4 into it since I decided not to use one of the crit dmg certs. There's not a lot of sacrifices to max crit dmg.
Crit rate is harder to max solo with human MA since we do not get the crit rate bonus. Im sitting at 66% with good gear and can reach 90% solo with procs, 100% easy with buffs. I can probably get 75-80% base if I get the awakened armor...
Attack speed is extremely important, more than a bit more p-attack, when using the awakened dagger. I wouldn't suggest devoting a whole build for attack speed and sacrificing crit rate, but you can get 15% from ranger cert, 5% from ice meteor, and 10% from legendary achievements. Most players get 15% from agi w/o a lot of agi stacked, so that's a nice 45% off the spot. I use the attack speed ring and have procs that give agi as well. Remember, more attacks per second = more dps = more procs activating = more chances for awakened dagger's effect =...you get the points :p
It's advisable to not depend on charge all the time for attack speed...as it can be removed.