Hello and welcome to my Level Cap Quassus build that i use to 1-2 shot the 9999lv demolysts.

Builds that use the 12x combo multiplier will be the best because of the heavy attack synergy and 2m bleed procs when used on an enemy that has been primed with viral.
Ofc we aim the head on both hits of the heavy attack.

For the maximum bleed procs only 3 things matter. CRIT CHANCE x CRIT MULTIPLIER x MELEE DAMAGE x Combo Multiplier. Mods such as Primed Fever are only good for overguard and for raw damage on armor stripped enemies. They do nothing for the true damage.

Ideally you want a riven with the [Quassus] because of the good disposition, with a god roll being something like : Melee damage , Crit damage , heavy att efficiency or ANY combination that will free up the most mod slots.

Heavy att efficiency at least 75%. if you roll 2+ and 1- , then the heavy att efficiency can be up to 88-90%, hence freeing up 2 mod slots ([Focus Energy] and [Reflex Coil]).

I've tried many different rivens, and the one i have rn : 87,9% heavy attack efficiency and 209,6% melee damage with -corpus, seems to be working the best out of the ones i've had so far.

Rivens with crit chance crit damage arent that valuable because you STILL need to slot in [Focus Energy] and [Reflex Coil] to keep combo up. We need the combo for the extra damage and guaranteed red crits with blood rush and gladiator might. After reaching 12x , even if you spam heavy attacks it'll stay at around 7-8x which is orange-red crit still.

If you manage to get a riven like : Crit chance-heavy att efficiency, then you could potentially replace [Blood Rush] for more melee damage , and ofc the 2 heavy att eff mods. If the riven has 3 bonuses and the heavy att efficincy from riven is at around 60-70, you'll still need Focus energy because the difference between 90% eff and 70% is huge. I suggest at least 80-85%.

For Grineer Endless then replace [Gladiator Might] for [Primed Smite Grineer].

I Suggest using Arcane Strike if you can slot it in so it can make the weapons heavy attacks a lot faster. Its a huge quality of life. Otherwise if you wanna use Arcane Blade Charger , you can replace [Killing Blow] for [Primed Fury], Berserker or [Gladiator Vice].

I Like to use ignis with this weapon because you can prime viral on everything and you dont need anything other than viral/heat. [Quassus] has pretty much infinite punch through on targets so [Ignis] can burn em all and then [Quassus] can rip em to shreds. Of cource [Epitaph] can work i just prefer a more dps option that can also synergize Arcane Blade Charger.

Please do buy a riven if you want to experience the best [Quassus] experience :*