This viral/heat build has a slow fire rate but a big funny number which ricochets and creates other big funny numbers. Using my cyte-09 build, with all his abilities up you should be red critting for 5-100 million and probably more if you set up and min max, but honestly it doesn't really matter because if you land a headshot with this guy whoever you hit and their extended family are probably dead, so there is also an optional faster firing build for QoL, as this much power is beyond overkill in 99% of content in warframe, even in steel path.
The empty slot is placeholder for [Primary Acuity] which gives +350% weak point damage and crit chance but disables multishot and is absolutely crisp in this build. Normally this trade might be questionable but cyte-09 has too much weakpoint damage for this mod to not be considered.
semi-rifle cannonade offers us more damage than serration while also disabling the -20% fire rate from [Critical Delay] which is a massive overall damage increase. The speedrun variation of this build opts to keep [Serration] instead and swap hellfire for vile acceleration, less damage but almost double fire rate will give better results in low-medium content.
[Target Acquired] is interesting because it does not increase the normal headshot multiplier (normally 3x) by 60% like it says, instead it gives you a 60% multiplicative increase to your total damage after all other buffs are calculated IF you get a headshot, and only a headshot. It does not work on other weakpoints like moa backpacks for example, but it is well worth it in this build unless all of the enemies in your mission have non-head weakpoints, if thats the case you may just want to swap it for a bane mod or serration.
it should also be noted that with [Cyte-09]'s 2nd ability you can add any element you want to adapt to whatever faction you are fighting.
but yeah basically just click the heads, i don't really use the alt fire but it's useful if you need the freeze to hit headshots.
shoutout to the OG version of this build ricochet jacobs fl4k from borderlands 3
Cyte-09 build: https://overframe.gg/build/768910/cyte-09/100m-cyte-09-neutralizer-focus/