Mordheim: City of the Damned

By the time your warband has a rating of around 2000, you whould be able to hold your own against brutal/deadly ai. Only play missions with exceptional wyrdstone, and try to find missions where both warbands deploy around their wagon, so that none of your units get caught alone. Even if you don't pick up any wyrdstone, just winning will give you about the same weight as picking everything up on average wyrdstone rating. If some wyrdstone spawns in a safe place, you can easily finish a mission with 150+ wyrdstone weight.