High PD kinda useless.

[Stryke11]

High PD for MA Ulm has never let me down. Although in my current Pythium game Mictlan of all nations routinely rolls my PD of 60+ and Oceania too. Makes me wonder if the money spent is worth it. I think out of maybe 15 attacks per turn to provinces undefended except for PD around 60, 2-3 are successful.

[KissBlade]

you should only build pd's at choke points and even then it's best to pad it up with one or two battle mages. I use pd often as chaff and anti call of the wind forces, nothing more.