Wait this thing has an OK base crit chance actually
You can do the Status Viral+Heat+Rad build OR you can do a hybrid crit+status build (that also still uses viral+heat(+rad)). There's a bit to say about the sacrifices we have to make here regarding reload speed and fire rate because of the 2 crit mods. More on that below.
If you don't want to [Sacrifice] either reload speed or fire rate without jumping thru some hoops, use the classic pure Status Viral+Heat+Rad build: https://overframe.gg/build/717347/
About Galvanized mods on Sentinels and MOAs
Note that Sentinels and MOAs CANNOT trigger the galvanized effect from Galvanized Mods by themselves. YOU (the player) must build up the stacks by yourself if you want your Sentinel/MOA to get the bonus stacks as well. Sentinels and MOAs also CANNOT sustain and keep the bonus stacks active by themselves either. YOU (the player) must refresh them by yourself if you want your Sentinel/MOA to keep the bonus stacks.
If you do not use Galvanized Chamber and or Galvanized Aptitude on your Rifle/whatever gun that can use G. Chamber OR if you use a Shotgun or any other weapon that cannot use G. Chamber and G. Aptitude, replace the Galvanized mods with the following:
About the crit mods and the build in general
The way the build is as you see right now (alternatively with [Serration] and Split Chamber), it works just fine and doesn't need any workarounds or replacing of mods. But if you want to truly min-max the [Verglas Prime], there's unfortunately a catch or two.
Since we have to spend 2 slots for the 2 crit mods, we have to give up Thermite Rounds and Radiated Reload/[Primed Fast Hands]. Because of this, the way I see it, there're 2 ways to build for this thing for minmaxxing, both in different ways attaining the faster reload speed, fire rate, and a third elemental damage for Manifold Bond:
In other words, pick your poison.