OM,
I'll give it a shot (which will surely kill your tread!). The key in my opinion is to avoid generating attention to yourself:
Pioneer - insane, way too high profile and you've got to be at least a little visible
High-Hour Publisher (18-50 hrs/month) - if you're a male, too risky. You'll generate attention from the BOE in the form of recommendations for "privileges". if female, you'll get "encouragement" to aux pioneer or regular pioneer - see above.
Strong Publisher (10-18 hrs/month) - Still too risky for a male. 10 hours per month is enough to get appointed. Female, this is probably ok but why increase the stats?
Low-Hour Publisher (5-10 hrs/month) - Man, you're tough. I would call this slightly below average. To me, this is the perfect range. Not enough to get appointed, too much to get the sheparding call that the next category will get. Basically, you'll be in the majority of the congregation and therefore under the radar. You can show up once a month to be "seen" (try to work with the SO or Secretary so someone will vouch for you at the BOE meeting.)
Super-Low-Hour Publisher (1-4 hrs/month) - You will get unwanted attention if you're a male. If a female, you'll likely not get too much hassle. On the plus side, a bunch of these publishers really knock the wind out of the averages.
Irregular - It will get attention but if you make it like every other month or so for about a year, the attention will drop.
Inactive - Not good if you're trying to stay in for family. Way too much attention, especially if you still attend meetings. Eventually, they'll give up on you but it may take a while.