This build gives a lot of flexibility. The exilus slot can be swapped to many different options if you prefer a different playstyle.
I chose [Primed Fever Strike] because it gives good damage from a single mod and adds another element to be applied for Condition Overload. It's also less common to have only toxin on primer weapons or sentinels since viral/heat helps much more.
If you want to lean into more slash, you can replace Primed Fever Strike with Buzz Kill to change the status priority. And if you want more damage and double-dipping, you can also use a bane mod instead of [Weeping Wounds].
The arcane is up to personal preference and what other things you plan to use with it. I like the comfort of more armor, plus it's a very easy arcane to max out with the new content.
One thing that the stats here don't show is that this build has a Combo Duration of 16 seconds, so it is very comfortable to keep combo if you are having to travel between packs of enemies. And keeping combo is even more important now that Tennokai lets us use heavy attack without losing combo stacks.
All-in-all, an on paper sustained DPS of over 50k with how comfortable this build is as well as only needing two forma is pretty good for me. Many other builds I have tried don't end up with real world results that match the paper DPS because of things like how quickly they lose combo if you have to travel between packs of enemies.