This is a critical hit and slash focused build, so before I begin the mod guide, it is worth noting that certain warframes and companions will work better with this bow than others, such as Zephyr/(prime) with her critical chance passive, and an Adarza Kavat for the Cat's Eye mod, from my personal experience.
This build can one-shot steel path corpus units with its huge crit-hit damage, almost guaranteed slash procs, and toxin procs that melt away the health of any shielded unit. I have tested this on level 140+ corpus steel path missions, and the only things that haven't died instantly are eximus units due to their annoying overguard. However, they DO die in about two or three hits, depending on the level and the kind of eximus power they have.
As for the Grineer, due to their high armour ratings, I had to change a few things around to include corrosive damage. I replaced [Serration] with [Stormbringer] to create corrosive, but honestly, it still wasn't as effective as the other mods were with the corpus. They would die in about two to four hits, but that would have to be doubled against eximus or even tripled when against Nox units. So, long story short, if you're dealing with the Grineer, a Grineer faction damage mod and [Corrosive Projection] on your warframe will help a lot. The corrosive damage is nice, but I believe with a primed faction mod, the corrosive damage may not be needed. However, I do not have such a mod myself, so if you are interested in this build and DO have the mod, let me know if it made a big difference.
Technically, you do one shot the grineer but thats only because of the slash procs over time. This will instantly kill the corpus as soon as they are shot, but it will take time with the grineer.
TL;DR: This particular build is most effective against the corpus, but could be changed around a bit to work just as well on the grineer too. Warframes and companions with crit chance/damage abilities are recommended.