[Mobhack]

I usually go for the 10 cm K18. 214 range gets most enemy arty, and it is quite cost effective.

Buy the battery early on, and ensure you engage some on-map targets to get the kills and hence experiece over the first few battles - high experience is the main prerequisite for CB fire, as well as the enemy having fired several times (to make spotting easier).

Leave it idle in the turn 0 for CB fire for engaging any enemy arty that fires then, and then usually leave idle to take pothots at the enemy arty, only using it as a reserve bty for when you have a "crisis" - and need the shells on the ground.

Cheers
Andy