Warhammer: The Old World is a different analytical challenge. Where AoS uses a skirmish-style activation system where individual units engage independently, The Old World is a game of ranked regiments, combined arms, and phase sequencing. The maths doesn't change — probability is probability — but the context in which damage is delivered and absorbed is fundamentally different.

The Old World introduces factors that AoS largely abstracts away. Initiative determines strike order, which means a unit's effective damage output depends not just on its weapon profile but on whether it survives long enough to swing. Rank bonuses, steadfast, and the psychology rules all affect combat resolution in ways that have no direct equivalent in AoS. The Statshammer framework adapts to account for these — not by abandoning D₁₀₀ and E₁₀₀, but by layering the additional variables on top of them.

The USP for The Old World content is strike-order modelling. Most players understand intuitively that going first matters. The Statshammer approach quantifies exactly how much it matters — expressing initiative advantage as a damage multiplier that can be folded into the efficiency calculation. A unit that strikes first effectively has a higher E₁₀₀ than its raw stats suggest, because some of the return damage it would otherwise absorb never arrives. That's a real, calculable effect, and it changes how you evaluate units with high initiative versus raw combat stats.

The Old World content is earlier in development than the AoS series, but the same analytical rigour applies. The framework is being built in the same sequence — baseline average unit, efficiency matrix, faction archetypes — with The Old World's specific mechanics incorporated at each stage. If you play The Old World and you're tired of relying on reputation to evaluate your regiments, this is the series for you.