high crit [Boltor] = fun
use an arcane avenger, a smeeta or adarsa kavat or [Harrow] to boost the amount of crit chance on hit
this weapon has a high weapon disposition of 1.20, so if you get a riven that can replace any of these mods, i recommend doing that.
good modifiers on a riven like (for this build) this would be: crit damage, crit chance, damage, [ streamable id="heat/electric/toxin/cold" ] and +% damage to a certain faction.

[Vital Sense] is (no pun intended) essential to the build that I am showing

[Galvanized Aptitude] can be switched for [Serration] out on lower level missions where you don't what to ramp up you damage to get a kill or when you dont have [Galvanized Aptitude]

[Galvanized Chamber] can be switched out for [Split Chamber] for instant +90% additive multishot or for when you dont have [Galvanized Chamber]

depending on who you are fighting you can switch the prime bane grineer to another bane.
if you do not have a prime bane, add a primary element instead such as heat or cold or you could put on a fire rate mod (seeing as this build uses [Critical Delay] whitch give crit chance but reduces fire rate)

if you are not fighting against grineer, infested or sentients, then you may switch out the elements to form a weakness to the faction you are fighting against

if you do not have [Galvanized Scope] you can switch it out for the normal version but i recommend until you have [Galvanized Scope], you should scrap the idea of a high crit [Boltor Prime] because you will not hit as many crits as you would with galvanized scope.

critical delay can be switched out for point strike if you dont have it or if you don't like the -20% fire rate from [Critical Delay]

you can switch primary deadhead for primary merciless if you are not good on getting headshots, but if that is the case then just don't use this build because it relies immensely on getting headshots to activate [Galvanized Scope]. you can switch it out for primary dexterity if you will be using this weapon in tandem with a melee but I don't' recommend that as it would be a waste of the gun

the exilus slot mod is completely optional, you can put in whatever you want in it.