Ferocity vs. CleaveFollow

Ferocity = increased chance to double attack
Cleave = increased chance to crit

I have both at 5 on my rogue and I'd say that fero gets the nod in terms of dps increase. Get both as you can.

That would be Radiant Howlite of Pure Sundering... only female barbarians get Pure Cleavage. ;)

Fero generally adds more DPS than Cleave for any class with Double Attack. However, there's no reason you can't have both. My rogue (who makes her own augs) has Fero, Cleave, and Dodge.

As for what Augs are best, look at not only the stat they raise but also what slot they're for. Alot of them, especially the primo ones like Howlite, Spheralite, etc. are restricted to only one equipment slot. Very few of the augs can be put in any visible armor slot.

Keep in mind for player made augs you can _drastically_ lower the price if you provide the expensive ingredient yourself. These are Slugworms (for the various "flow type augs, mossflow, fireflow, etc.), the augs themselves for things like Howlite, Spheralite, Kyanite, etc, and Discordiant Scoriae/Black Gold Inlay (needed to make any of the "Pure" augs). The remaining ingredients are fairly cheap if you provide that stuff.