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When a unit is fired at by a unit with multiple weapon profiles, the attack sequence goes through each shot completely, including the allocate wound and save roll?
This is key for the Helix Gauntlet ruling. Which states the FIRST failed save, has the damage characteristic of that attack reduced to 0.
Example. You shoot my Infiltrator squad with a dev squad including 2 lascannons and 3 bolters. You wound with both lascannons and only 1 bolter shot.
If I must roll my save, as each shot is fired, clearly it is in the best interest of the attacker to roll his bolter shots first, to make my Helix Gauntlet less effective.
Otherwise, as the owning player of the unit, I want to roll my saves against the lascannon shots first.

Trying to determine how much this hurts the Helix Gauntlet...

You roll all of one weapon profile and resolve them before even rolling the other profile.

So you wouldn’t even know the results of the lascannon until after the wounds from the bolter were resolved or Vice versa.

Technically, every shot happens individually.

So let's say you're Rapid Firing the Bolters, for 6 shots from them, and 2 Lascannon shots.

You could roll one Bolter shot, all the way through, then the next, then the next, until six have been done.
Then the Lascannons, same thing.

Now, you are 100% free to fast roll them, but only the same type of weapons. So you could roll all six Bolters together, then both Lascannons, but not all eight shots together.

In other words, you can definitely shoot the Bolters before the Lascannons.

Of course you can pick which weapon goes first, and against the helix you want to try the bolters first.

edwardmyst wrote:
When a unit is fired at by a unit with multiple weapon profiles, the attack sequence goes through each shot completely, including the allocate wound and save roll?
This is key for the Helix Gauntlet ruling. Which states the FIRST failed save, has the damage characteristic of that attack reduced to 0.
Example. You shoot my Infiltrator squad with a dev squad including 2 lascannons and 3 bolters. You wound with both lascannons and only 1 bolter shot.
If I must roll my save, as each shot is fired, clearly it is in the best interest of the attacker to roll his bolter shots first, to make my Helix Gauntlet less effective.
Otherwise, as the owning player of the unit, I want to roll my saves against the lascannon shots first.

Trying to determine how much this hurts the Helix Gauntlet...

Each attack is resolved entirely, in order. The attacker chooses the order. The only caveat to that is that weapons with multiple attacks (Heavy 3 for example) must make all of their attacks and further must make them all before moving on to another weapon.
Further, the “fast rolling” rules only allow you to group shots with the same S, Ap, D, special rules and to-hit value so you could only group the lascannon together as one set of rolls and the heavy bolters as another set. You can’t use fast rolling to make a bunch of heavy bolter shots and then a bunch of lascannon shots without rolling saves, allocating hits and resolving damage in between.

So to answer your question, yes it is in the attacker’s interest to use the bolters first and it is also their prerogative to do so. This has not actually changed since 8th Ed and I’ve never rated the helix gauntlet highly because of it.

Just remember that once you allocate a wound to a model, whether by choice or forced to because it is a wounded model, you must allocate all further wounds from that round of shooting against that same model until it dies. This is a change from 8th edition.

You can't, for example, allocate 3 bolter wounds to Lightning Claw Terminator A, pass them all, then allocate a lascannon wound to Storm Shield Terminator B. You'll have to put the lascannon wound on LCTA.

Thank you for the accurate and quick answers. Helps me decide if that gauntlet is worth it or not (hey, ignoring the first damage is still something...)

Remember that mini cost is 24 points for an infiltrator. Unless they are crazy over killing the unit, it pays for itself on the first turn.

Yeah, that's a good point Leth. Have to think of that 10 points as possibly saving 24 on the table, and maybe more than once since they won't be a high profile target. Or at least not a very high profile target (I am not impressed by their damage output, but like the versatility)