it's this simple, avoiding what challenges you on the mountain is rarely ever going to challenge your personal skill sets.
Agreed, some bump lines that I have dropped into were pretty gnarly, BUT non the less it still was worth the effort. My other thought, taking a somewhat passive approach I.E. - making a series of slow traverses across the mogul field. This will intruduce both the body, legs, and equpiment to the various terrain changes happening. Speed control comes much easier for this task. As rider becomes more comfortable with both the movement concepts (what body is doing) and board performance concepts (what the board is doing.) Then the path of travel should the be tightend up or take a slightly incresed line down the hill. In addition a quick note, I always split the run into very small digestable sections. The main though here is speed control, board control and rider confidence arrive much quicker in theory.As with the mastery of the skill sets necessary to navigate a bump run... so in turn the line / path of travel down the fall line will increase.
Yes I will also chime in and say at some point you may feel like things are coming un-hinged while doing this...BUT isn't that why we started this doing this sport to beging with. Let things get a little hairy, the slowly reel it back in. I'm not saying straight line and take out everyone on the slopes. Use common sense and your discretion here, pick days / conditions to task this excercise when the hill traffic and incident potential is less likely.