Quick and Dirty DPS Build
One thing to note: This build is EXPENSIVE. 116,870 Endo is nothing to sneeze at.
You can find my Beginners Saryn Build here
And my Intermidiate Saryn Build here
Blind Rage, Transient Fortitude and Umbral Intensify for Good base damage and faster damage scaling.
Overextended, Stretch and Cunning Drift for high range, making spores spread all over the place.
Streamline, Energy Siphon, Hunter Adrenaline, and Arcane Energize for a fair bit of energy economy. You can run Energizing Dash as well (I do) for energy on demand.
Vitality and Arcane Guardian for general defense and taking advantage of Hunter Adrenaline without getting instantly blown up.
You can take Arcane Grace if you feel you have no energy issues. If you slot in an umbral format you can move Overextended to the D polarity and run both Umbral Intensify and Vitality but that's a big cost for an increase of 11 strength and 138 hp.
Giving Saryn Breach Surge from Wisp is something I've had good results with. The blind will buff your damage even more, give you double procs on the spore damage and help cc the enemies. The radiation procs from Breach Surge will also add another layer of cc, although really not all that important.
Giving her Roar is absolutely an option, you will slaughter crowds faster, but I prefer Breach Surge as it adds some CC to her kit.
Here's the Zaw I use for playing Saryn(It's where my healing comes from!): Link
Once you're done maxing this build, check out my personal Build with Umbral and Aura forma included and the Riven'd Zaw I personally think it's Saryn's Final Form!