Tactical Reroll
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Bonus share by keyword, and bonus casters (T-717)

From reports/tiers/2026-10-05-bonusshare.md , rendered when the site is built.

5 Oct. Two game-wide dials built as exam post steps (tools/bonusshare.js), each 0 = today to the bit (checked on all 16 armies). Discovery only: nothing adopted, no ledger file or value changed. Measured on the ledger snapshot dcd477d8a78c (the tip after T-715's leader fixes, 34b6285814), Track A (step 34b, wCarry 0).

In plain English

The idea. An army's rule, the detachments its players run and its units' auras hand out bonuses. Some units can receive most of them (they carry the right keywords and their attacks qualify); others can't. The Thousand Sons research said reviewers rate the Psychic-keyword infantry up and the generic daemon engines down for exactly that reason. And the characters who make the hard rituals succeed (Magnus, Ahriman) are valued for that, not for filling a caster slot.

What we built.

What it says.

Most Rubric and Scarab damage comes from inferno boltguns, combi-bolters and khopeshes, which aren't Psychic in the datasheets. Their Psychic weapons are the Aspiring Sorcerer's few shots. So the Psychic-gated detachment bonuses reach a small part of their damage. The keyword story holds for who gets nothing, not for who gets the most.

Verdict. Neither dial holds out game-wide. Bonus share is a Thousand Sons-only gain (+8.4 at 1, placebo +1.3), and it comes through the units that receive nothing rather than the Psychic infantry. It is a candidate only as an army-specific cascade axis at 0, 0.5 and 1, beside T-711's split and stickiness. Bonus casters, as built, carry too little to matter.

Thousand Sons, before and after

The package. Detachments are read from 9 of its 11 11th-edition lists (top-quarter lists counted twice):

Effect weights (w) and values (v, the median gain per unit; "1" is the army's median, used for a rule with no dice):

FromEffectwv
Cabal: Destiny's Ruin (odds of a plain caster)re-roll hit 1s, every Thousand Sons unit's ranged attacks into the target0.980.17
Cabal: Twist of Fate+1 AP, the same0.740.22
Grand Coven: Psychic MaelstromPsychic weapons +1 to wound0.170.29
Grand Coven: Wrath of the ImmateriumPsychic weapons Devastating Wounds0.170.30
Warpforged Cabal (no dice)vehicles (our reading)0.251 (0.23)
Sekhetar CohortSekhetar Robots +1 to hit in melee0.080.25
Changehost of Deceitpsykers 4+ invulnerable against shooting0.080.20
Ritual of Regeneration (no dice)psykers, not monsters: healing0.081 (0.23)
Rubricae PhalanxRubricae +1 save against Damage 10.080.23
Hexwarp Thrallband (two options)Psychic re-roll wound 1s / +1 to wound0.04 each0.17 / 0.29

Shares (median 0.42), highest first:

The rituals: our odds and prices.

Ranks among the army's 35 ranked units (exam: 38.2 Track A):

UnitReviewerShareCaster credit (pts a game)Rank: Track A → share 0.5 → share 1 → caster 1Stack → stack + both 1Value: Track A → share 1 → caster 1
Rubric MarinesS0.47–7 → 5 → 5 → 71 → 21055 → 1112 → 1055
Scarab Occult TerminatorsA0.29–27 → 27 → 27 → 2726 → 23503 → 441 → 503
Sekhetar RobotsA0.57–6 → 3 → 2 → 66 → 31130 → 1306 → 1130
TzaangorsA0.13–14 → 20 → 23 → 1421 → 26784 → 558 → 784
Mutalith Vortex BeastS0.29–25 → 25 → 25 → 2627 → 27574 → 498 → 574
DefilerS0.41–4 → 4 → 4 → 44 → 51150 → 1145 → 1150
MaulerfiendC0.10–1 → 6 → 7 → 18 → 161284 → 876 → 1284
ForgefiendB0.62–3 → 1 → 1 → 33 → 11218 → 1458 → 1218
HelbruteD0.12–9 → 12 → 18 → 919 → 22945 → 663 → 945
Chaos SpawnD0.00–13 → 22 → 26 → 1324 → 29802 → 466 → 802
Magnus the RedS0.40423 → 24 → 21 → 2422 → 18580 → 571 → 586
AhrimanA0.46–22 → 19 → 16 → 2210 → 9657 → 687 → 657
Exalted SorcererS0.341126 → 26 → 24 → 2325 → 20552 → 510 → 637
Exalted Sorcerer on Disc of TzeentchC0.271229 → 29 → 29 → 2830 → 28310 → 265 → 408
SorcererS0.45–33 → 32 → 32 → 3333 → 33203 → 209 → 203
Infernal MasterS0.45–28 → 28 → 28 → 2929 → 30336 → 345 → 336
Daemon Prince of TzeentchB0.34–10 → 8 → 9 → 109 → 13930 → 860 → 930

Ahriman has no credit: at +1, channelling on a 100-point character costs more than the +1 gains over a free caster.

Thousand Sons' exam score at each setting (the placebo is the mean of 3 seeds):

Setting0.250.51
bonusShare (placebo)39.5 (37.9)41.1 (37.9)46.6 (39.5)
bonusCaster (placebo)38.2 (38.2)37.9 (38.2)37.9 (38.4)
the stack (49.5) + both dials (placebo)52.1 (48.7)52.8 (48.1)54.0 (46.7)

World Eaters' casters:

The tables

Held out by army (the strength chosen on 10 armies, 0 included, scored on the other 5; 3 seeded splits; mean ± SE; the stack's row is measured against the stack):

DialScoreReal (picks)± SEPlacebo (picks)± SE
bonusShareexam (mean over 11e lists)−1.22 (0, 1, 0)1.22+0.00 (0, 0, 0)0.00
bonusShareconsensus pairs−1.22 (0, 1, 0)1.22+0.00 (0, 0, 0)0.00
bonusCasterexam+0.00 (0, 0, 0)0.00+0.00 (0, 0, 0)0.00
bonusCasterconsensus pairs+0.00 (0, 0, 0)0.00+0.00 (0, 0, 0)0.00
both dials on the stackexam+0.00 (0, 0, 0)0.00+0.00 (0, 0, 0)0.00
both dials on the stackconsensus pairs+0.00 (0, 0, 0)0.00+0.00 (0, 0, 0)0.00

In sample, each strength. Pooled over the 15 armies' 11th-edition lists (consensus pairs where an army has 2 or more lists). Thousand Sons and the Tyranids' three 11e headline lists are shown beside, never pooled.

SettingExam, 15ΔPlacebo ΔConsensus, 15ΔPlacebo ΔArmies betterThousand SonsΔPlacebo ΔTyranids, 3 listsΔ
Track A59.360.038.281.6
bonusShare 0.2559.2−0.1−0.259.9−0.1−0.27/1539.5+1.3−0.381.6−0.0
bonusCaster 0.2559.3+0.0−0.060.0+0.0−0.10/1538.2+0.0−0.081.6+0.0
bonusShare 0.558.6−0.7−0.859.2−0.8−0.87/1541.1+2.9−0.381.3−0.3
bonusCaster 0.559.3−0.0−0.060.0−0.0−0.10/1537.9−0.3−0.081.6+0.0
bonusShare 158.2−1.2−2.058.8−1.2−2.16/1546.6+8.4+1.380.8−0.8
bonusCaster 159.3−0.0−0.160.0−0.0−0.10/1537.9−0.3+0.281.6+0.0
the stack (armyEnabler 1 + the Votann three)62.2+2.963.0+3.011/1549.5+11.381.3−0.3
the stack + both dials at 0.2561.9+2.6+2.462.7+2.7+2.59/1552.1+13.9+10.581.2−0.4
the stack + both dials at 0.561.2+1.9+2.062.0+2.0+2.19/1552.8+14.6+9.980.8−0.8
the stack + both dials at 160.5+1.2+0.961.2+1.2+0.99/1554.0+15.9+8.580.5−1.1

Per army (exam score on its 11e lists; the stack, and both dials at 1 on top of it; the share's spread):

Army (lists)Track AbonusShare 0.5ΔbonusShare 1ΔbonusCaster 1ΔStack+both 1Δ vs stackshare median (quartiles)lists read
Thousand Sons (1)38.241.1+2.946.6+8.437.9−0.349.554.0+4.50.42 (0.27–0.47)9
Space Marines (2)60.160.1+0.060.0−0.060.1+0.059.960.2+0.40.87 (0.86–0.88)41
Adeptus Mechanicus (1)71.472.7+1.273.0+1.671.4+0.070.272.0+1.90.33 (0.33–0.42)20
Agents of the Imperium (1)56.154.7−1.348.4−7.656.1+0.048.941.7−7.20.83 (0.83–1.00)1
Astra Militarum (1)67.667.7+0.267.2−0.467.6+0.067.367.2−0.20.37 (0.29–0.40)25
Blood Angels (1)61.361.3+0.063.7+2.461.3+0.067.770.2+2.40.79 (0.76–0.86)12
Dark Angels (1)53.753.9+0.254.4+0.653.7+0.056.356.4+0.10.84 (0.73–0.84)28
Death Guard (1)55.049.8−5.348.5−6.555.0+0.056.750.0−6.70.72 (0.72–0.74)24
Drukhari (1)58.060.9+2.964.3+6.358.0+0.059.964.7+4.80.45 (0.00–0.65)12
Emperor's Children (1)69.663.4−6.359.7−9.969.6+0.073.861.3−12.60.81 (0.68–0.94)21
Genestealer Cults (2)56.457.2+0.856.6+0.256.4+0.056.957.6+0.70.00 (0.00–0.10)7
Leagues of Votann (1)61.061.0+0.060.0−1.061.0+0.075.278.1+2.90.81 (0.79–0.81)16
Orks (1)63.561.7−1.860.6−3.063.5+0.064.258.7−5.40.54 (0.41–0.67)19
Space Wolves (1)50.750.0−0.748.6−2.150.7+0.054.352.9−1.40.78 (0.76–0.80)9
World Eaters (3)67.263.4−3.961.0−6.267.2+0.072.562.1−10.40.67 (0.16–0.82)17
Tyranids (fitted on, not pooled) (3)81.681.3−0.380.8−0.881.6+0.081.380.5−0.70.58 (0.51–0.77)31

Method notes and choices

The package.

The casters.

Doubts