a Steelhoof marauder  

just north of the coldwind beach spawn point 282.95, -21.38, 1269.53

Gerard's Resonant Sonata (adept I)

slow spawn, bug allows for faster spawn, kill marauder at rocks, then hit the helper, then end fight and run, when u get back new marauder will be waiting. Only 40% have spears, may have to kill 30 to get 12 spears