ok this is a combo build and this build is good against grineer because from what i know they're weak to viral and radiation i don't know for sure which one is more affective against grineer but if they ever add a primed [Molten Impact] u can switch to using radiation for grineer, blast for infested, and still gas for corpus.
now what you will need to change is the [Vicious Frost] with what ever status and elemental damage needed to change the combo according to what enemy ur up against like changing [Vicious Frost] to [Voltaic Strike] for corrosive damage against infested and [Volcanic Edge] for gas against corpus.