Another look at the new augments, Zephyr's this time. It allows for up to a 500% buff to secondary damage; depending on how many targets you hit with Airburst.
Let's start with Arcanes and mods first; kinda backwards, I know but the rest is a bit more open ended.
Arcane Precision: Gets your secondary up to a 300% bonus for 18sec on head shots (headshot, Airburst then do it up.
Theorem Demulcent: A little more situational but it can give you bursts of additional damage of up to 180% for 20sec + when standing in a zone created by a residual arcane, which means:
Secondary Kitgun w/Residual (X): I prefer Gaze because you can aim your headshots and it chains. It"s also a high fire rate beam weapon; which lends itself to frequent proc and crit checks. In addition to the synergetic damage buff that it gives Demulcent; Residual Arcanes do a bit of damage on their own (my preference is Residual Shock).
Gaze also has innate radiation; good for setting up another combined element. Of course I went Viral (for the health damage stacking) and Electric (for more AoE spread). Hornet Strike, Barrel Diffusion, Augur Pact and Primed Pistol Gambit is a good start for modding (as always, a riven helps)
Vigorous Swap: A little tricky to work with as the 165% buff happens when you swap out weapons for only 3sec (headshot, Airburst, swap out, THEN do it up)
So far, that's a little over 1400% in available buffs before considering basic modding, viral procs and Warframe abilities.
Good for any frame that you can subsume Airburst into. Very good for a heminthed Vex Armor Chroma or damage Queen Saryn.