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Am I doing this right?

15 Tankbustas vs a Vehicle with T=8 and 3++

Figuring number of ADDITIONAL ATTACKS:

15 x [(1/6) + (4/6)(1/6)] = 4.16 additional attacks (let's say 4)

Unsaved wounds from ADDITIONAL ATTACKS:

4 x {[(2/6) + (4/6)(2/6)] x [(3/6)(3/6)]} = 0.5

Unsaved wounds from TRADITIONAL ATTACKS:

15 x {[(2/6) + (4/6)(2/6)] x [(3/6)(3/6)]} = 2.07

What rules do these guys have? What are they equipped with? Why do they get additional attacks?

Need more information.

I never understood if the dice triggered another dice, or an attack with a weapon. The later being better with multiple shots.

 mrhappyface wrote:
What rules do these guys have? What are they equipped with? Why do they get additional attacks?

Need more information.

rokkit launcha = S8 -2ap 3dmg, BS 5+, reroll misses on vehicles.

dakka dakka strategem = hits on 6+ grant another attack.

 doktor_g wrote:

Am I doing this right?

15 Tankbustas vs a Vehicle with T=8 and 3++

Figuring number of ADDITIONAL ATTACKS:

15 x [(1/6) + (4/6)(1/6)] = 4.16 additional attacks (let's say 4)

Unsaved wounds from ADDITIONAL ATTACKS:

4 x {[(2/6) + (4/6)(2/6)] x [(3/6)(3/6)]} = 0.5

Unsaved wounds from TRADITIONAL ATTACKS:

15 x {[(2/6) + (4/6)(2/6)] x [(3/6)(3/6)]} = 2.07

Hmm i don't think it works like that.

----------------------------------------------------------------------------------------
15 attacks x 1/3 (BS 5+)= 5 hits
15 attacks x 1/6 (additional attack on 6+)= 2,5 additional attacks
2,5 x 1/3= 0,83 hits from additional attacks
5+ 0,83 = 5,83 total hits
5,83 x 1/2 (S8 vs T8) = 2,91 wounds
2,91 x 2/3 (Sv 5+) = 1,94 unsaved wounds
---------------------------------------------------------------------------------------
In general though, when mathammering stuff and you have effects like "Extra hit on 6+" "Reroll 1's to hit" or "Reroll 1's to wound" and you don't have flat bonuses or penalties like the Necron "My will be done" or moving hit penalties, you can just exclude those from the math and for each of these multiply the final result by 7/6, it's mathematically the same. That's handy when you are mathammering on the fly.



EDIT: Oh that's right, reroll misses on vehicles! That is an increase of 66% in unsaved wounds caused. So the total unsaved wounds are 3.12, that's a Leman Russ now shooting on 6+.

(@Spoletta) Pretty sure it's right. I think you forgot the re-roll in your first term first line...

There are 15 Tankbustas S8 AP-2 Assault 1 vs Vehicle with T8 3++
(@MrHappyFace) Tankbustas re-roll vs Vehicles in this case T=8. Dakka Dakka Dakka Strategem is make an additional ATTACK (@Niiai) if any of your to hit rolls were a 6.

Number of additional attacks will be the number of 6s rolled initially
(15 shots) x [(Number of 6s initially) + (Number of 6s on re-rolls)]

so...
15 [(1/6) + (4/6)(1/6)] = 4.16

Number of hits vs vehicle will be Additional hits by DDD! plus Tankbustas with re-rolls

so...
(4.16) + 15 [(2/6) + (4/6)(2/6)] = 12.493 Hits

Number of Unsaved wounds vs 3++ will be

12.493 [(3/6)(2/6)] ~=~ 2

Rokits do 3 damage so 6 damage removed from that beastie.

If it is something like a leman russ without invuln expect....
12.493 [(3/6)(5/6)] ~=~ 5 unsaved wounds 15 points of damage.

Actually lets make it easier for figuring in your head.

Mulitiplier x Save where...

Multiplier = 12.493[(3/6)(1/6)] = 1.041083

Therefore, in this situation (15 Tankbustas with DDD! Strategem vs T8+ vehicle) expect the following results vs saves after AP applied...

6+ = 6 Wounds = 18 Damage
5+ = 5 Wounds = 15 Damage
4+ = 4 Wounds = 12 Damage
3+ = 3 Wounds = 9 Damage
2+ = 2 Wounds = 6 Damage

That's convenient and elegant....

I did account for reroll against tanks in the last line.

By the way the DDD stratagem is additional attacks, not hits.

re-read my 3rd line...

It works exactly the same way as the space marine bolter drill stratagem. When rolling to hit, add another attack (another die) for every 6+. For example

Rudolpho McCuntlicker is attacking with his 30 shoota-boyz. He opts to use the Dakkax3 stratagem. He then rolls 60 dice of which 11 rolls 5 and 10 rolls 6. As there are no modifiers in this instance the stratagem leads to an additional ten attacks. He picks up another ten dice (as an Ork player McCuntlicker is well supplied with dice. With tournament trophies, not so much). He rolls these extra ten dice and gets another 5 and two additional 6'es. He now counts twelve 5's and twelve 6's which results in 24 hits due to his Orks magnificent ballistic skill of 5+.

doktor_g wrote:re-read my 3rd line...

I did, but

doktor_g wrote:(@Spoletta) Pretty sure it's right. I think you forgot the re-roll in your first term first line...

There are 15 Tankbustas S8 AP-2 Assault 1 vs Vehicle with T8 3++
(@MrHappyFace) Tankbustas re-roll vs Vehicles in this case T=8. Dakka Dakka Dakka Strategem is make an additional ATTACK (@Niiai) if any of your to hit rolls were a 6.

Number of additional attacks will be the number of 6s rolled initially
(15 shots) x [(Number of 6s initially) + (Number of 6s on re-rolls)]

so...
15 [(1/6) + (4/6)(1/6)] = 4.16

Number of hits vs vehicle will be Additional hits by DDD! plus Tankbustas with re-rolls

so...
(4.16) + 15 [(2/6) + (4/6)(2/6)] = 12.493 Hits

Number of Unsaved wounds vs 3++ will be

12.493 [(3/6)(2/6)] ~=~ 2

Rokits do 3 damage so 6 damage removed from that beastie.

If it is something like a leman russ without invuln expect....
12.493 [(3/6)(5/6)] ~=~ 5 unsaved wounds 15 points of damage.

Actually lets make it easier for figuring in your head.

Mulitiplier x Save where...

Multiplier = 12.493[(3/6)(1/6)] = 1.041083

Therefore, in this situation (15 Tankbustas with DDD! Strategem vs T8+ vehicle) expect the following results vs saves after AP applied...

6+ = 6 Wounds = 18 Damage
5+ = 5 Wounds = 15 Damage
4+ = 4 Wounds = 12 Damage
3+ = 3 Wounds = 9 Damage
2+ = 2 Wounds = 6 Damage

That's convenient and elegant....

You are auto hitting your additional attacks.

It should be [(4.16) + 15] [(2/6) + (4/6)(2/6)] = 10,49 Hits

I see. You are absolutely right... auto hits

Just for my OCD for completeness:

Dakka Dakka Dakka Strategem on 15 Tankbustas vs T8 Vehicle

Extra Hits = 15 [(1/6) + (4/6)(1/6)] = 4.16

Total Hits = (4.16 + 15) [(2/6) + (4/6)(2/6)] = 10.64

Multiplier vs Save = 10.64[(3/6)(1/6)] = 0.887

Modified Saves to Damage
6+ = 5.3 Wounds = 15.96 Damage
5+ = 4.4 Wounds = 13.31 Damage
4+ = 3.5 Wounds = 10.64 Damage
3+ = 2.7 Wounds = 7.98 Damage
2+ = 1.8 Wounds = 5.32 Damage

Not quite as elegant unfortunately...