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Okay, a few disclaimers:

Playing a Primaris SM / IG army

What I call "Personal Fluff" is important to me, but still want an army that gives a good game, even if not super competitive (Don't like being steam rolled). Due to this "normal" SM are a no no. The guards represent Chapter Serfs.

I tend to use Raven Guard / Vostroyan (someday I will learn to spell it).

My collection is basically: The Space Marines from Dark Imperium (x2) With a couple of them being converted to a librarian and an extra Captain. Plus a few Guard (a CC, a MoO, Primaris Psycker, some infantrymen, and some Heavy Weapons)

So I have 4 heavy weapons bases done (2 Mortar, 1 Lascannon, 1 Missile Launcher). I have the parts to do 2 more, what would you suggest for the extra two

For more competitive I would go more mortars.

For more casual I would go Autocannons or even heavy bolters.

People say Mortars because then people won't see them as a threat and will leave them alone. Something like Heavy Bolters are too much of a threat and your opponent will make them a targeting priority, so go with the less threatening weapon.

IMO if the weapon isn't a threat, then why take it? Heavy Bolters all the way.

I'm surprised that Lascannons are not being recommended, considering how little anti-vehicle I have.

JmOz01 wrote:
I'm surprised that Lascannons are not being recommended, considering how little anti-vehicle I have.

That's because every two shots is an average of one hit. You'd need something with higher rate of fire. Autocannons and mortars would be the go-to.

An auto cannon and a LC? I personally like a lot the auto cannon.

"That's because every two shots is an average of one hit."

Cadian Doctrine plus a Company Commander/Platoon Leader giving the Take Aim! order = better shooting than a Space Marine.


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"An auto cannon and a LC? I personally like a lot the auto cannon."

Autocannons are characterful but armies need anti-infantry and anti-tank.

Anti-infantry means Heavy Bolters, and anti-tank means Lascannons. IMO put the Lascannons in the Infantry Platoons and the Heavy Bolters in the Heavy Weapons Teams, buffed by Company Commanders/Platoon Leaders.

Why not take missle launcher and have both? Additionally missle launcher does not need bi or tripod so You have parts to build multiple weapon teams

It massively depends what else you have in your army and what you expect to face. Assuming you don't know the latter, you need decent amounts of anti-hoard, anti-elite infantry, and anti-tank. This will largely dictate your choice. There is no outright bad option in a vacuum, it all depends on your overall list.

Gnollu wrote:
Why not take missle launcher and have both? Additionally missle launcher does not need bi or tripod so You have parts to build multiple weapon teams

When you mathhammer the difference between S8 AP -2 and S9 AP -3 against T8 3+ SV then you will see that Missile Launchers are NOT reliable anti-tank weapons.

Krak Missiles are for killing MEQs and "light" vehicles like Rhinos & Dreads.

phydaux wrote:
Cadian Doctrine plus a Company Commander/Platoon Leader giving the Take Aim! order = better shooting than a Space Marine.

He literally says in the OP he is using Vostroyans.

To the OP, just take mortars. Nothing else is remotely points efficient.

phydaux wrote:
People say Mortars because then people won't see them as a threat and will leave them alone. Something like Heavy Bolters are too much of a threat and your opponent will make them a targeting priority, so go with the less threatening weapon.

IMO if the weapon isn't a threat, then why take it? Heavy Bolters all the way.

It's also very cost effective in destroying stuff. It's also good in that you can put it outside LOS. For HWS team if it's not out of LOS it's dead. They are super easy to take out. Only weapon you should be putting on HWS teams are mortars. Others just die.

Now for infantry squad out of LOS isn't useful as they are more screen use so assuming you aren't thin on points HB's or autocannons(which are becoming useful again with DE) are more viable.

But to say mortars aren't threat is giving them disservice. You don't need to have high stats to be a threat. Quantity also matters and 8th ed more so.


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phydaux wrote:

Gnollu wrote:
Why not take missle launcher and have both? Additionally missle launcher does not need bi or tripod so You have parts to build multiple weapon teams

When you mathhammer the difference between S8 AP -2 and S9 AP -3 against T8 3+ SV then you will see that Missile Launchers are NOT reliable anti-tank weapons.

Krak Missiles are for killing MEQs and "light" vehicles like Rhinos & Dreads.

Missile launchers you put on raven guard devastators for 2d3 mortal wounds against flyers. Then heavy bolter for 2d3 mortal wounds against non-flyers.

Stux wrote:
It massively depends what else you have in your army and what you expect to face. Assuming you don't know the latter, you need decent amounts of anti-hoard, anti-elite infantry, and anti-tank. This will largely dictate your choice. There is no outright bad option in a vacuum, it all depends on your overall list.

I did state in my original post, but will list it out


HQ: Primaris Captain, Captain in Gravis, Primaris librarian, 2 Primaris Lt's
Troops, Fast, Heavy: 20 Intercessors, 6 Inceptors, 10 Hellblasterss
Elite: Primaris Apothecary, Primaris Ancient

-------
Imp Guard

HQ: Company Commander, Primaris Psycher
Core: 3 Infantrymen squads (With Heavy Weapon and Special Weapons)
Heavy: Heavy Weapon Team
Elite: Master of Ordnance

Slayer-Fan123 wrote:

JmOz01 wrote:
I'm surprised that Lascannons are not being recommended, considering how little anti-vehicle I have.

That's because every two shots is an average of one hit. You'd need something with higher rate of fire. Autocannons and mortars would be the go-to.

No. No. No. This is not how it works, at all. BS is irrelevant because it applies equally to all weapons. The LC has lower rate of fire but each shot is more likely to do damage, and more of it.


Automatically Appended Next Post:
Anyway, the answer is LC on infantry squads. Best gun, take it. HWS take mortars because they have no meat shield wounds and die immediately if anything gets LOS on them. Mortars can stay out of LOS and survive.