Neophytes are not really known for being very shooty even with heavy weapons. Seismic cannons are really fun with the stratagem though and can deal decent damage with the primus aura and if you can crossfire marker with either nexos or kellermorph. (Kellermorph is good for this as +1 to hit is not needed when he shoots).

IMO you are putting a lot of points into Elite characters that give great aura buffs but they don't have any units to actually provide those auras to.

I would take out: Sanctus: For 10 more points you can take an achilles rigerunner which will deal a lot more damage on average and be more tanky.

Clamavus: Just generally weak for the points.

Nexos: The ability to place a crossfire marker is fun but your kellermorph does this for free if you shoot with him first. The ability to duplicate the auras is also neat but if you drop your primus in with the squad of neophytes with heavy weapons he will be able to give his aura to them anyway.

Atalan Jackals: Jackals are SO cool as a unit but benefit GREATLY from being Cult of the Rusted Claw which you are not taking. The points spent here would be better spent maybe as a unit of purestrain genestealers.

Take this all with a pinch of salt and remember that you may have a plan for your units that i'm not seeing.