Trick with any DoH *grind*, use rested bonus as much as possible (50%), get the engineering book from your GC (50%), shoot to craft highest level "stack" item available to you so it doesn't take up your inventory space, and aim for highest quality score (not HQ product) as much as possible. When done right, each craft you give you 250-300% exp, which can easily take you to the next level within a few crafts at low levels with each craft giving you 2-3K exp. HTH.

jc