Mass Combat AV & DV?

By trideau, in Deathwatch Rules Questions

Reference: New Deathwatch(Mark of the Xenos) book, mass combat section, pg 140 - example

The following are the Attack and Defense values for 3 different hordes

Storm Trooper (AV6 DV5)

Fire Warriors (AV7 DV5)

Battlesuit (AV5 DV5)

I have used the guideline listed in the book for calculating AV and DV for the hordes and don't come out with the values that are listed. Can someone map out the AV and DV for the listed hordes, mainly the Battlesuit?

Thank you in advance,

Terrence

For what it's worth, I should point out that there is a good chance that the values given are completely arbitrary. The example does not list any hard numbers (how big are the Hordes? what are the battlesuits armed with? For that matter, what type of battlesuits are they?), making any attempt to "reverse-engineer" the numbers somewhat difficult.