I have been playing SAW for a few months now, and I personally feel that a mixed build is the way to go. And saying weapon builds don't work as well is a bit over the top. WP SAW is extremely deadly if their spin ups are at max. And whie Mad canons effectiveness does go up significantly with CP builds, I would still go for a mix build over full CP. Just my opinion, don't have to listen to me :)

ehh.....clockwork is 50% cool down and it is really really important to CP SAW because the goal is to only fight with abilities as the basic attack is weak and it slows SAW down.

Buying clockwork first seems a little ridiculous. You could double your damage with shatterglass, but instead you choose to make cooldowns 33% shorter? Even if you need the energy, why not go for eve of harvest?