No need to exceed 30mg daily -
I don't lose anything besides the water from a dbol only cycle. Here's a sample - took between 15-25mg daily for 4 weeks. Gained 18 lbs total (no increase in body fat % but I also didn't get cut either) - lost 3-4lbs. right away dropping to 14-15lbs. Ended up 8 weeks out with 13lbs. kept - sustained through 6 months after cycle (all natural after cessation). No clomid, hcg, or anti estrogens and no side effects. This was a long time ago.
Obviously many people on this board have problems keeping their gains from dbol. I think my moderate usage and slow tapering (no drastic drops) enabled me to keep most. Short cycles also helped my natural test recover. 6-8 weeks was a long cycle for me.
Here are a few tricks I used that seemed to be very effective over the years. I tended to use less drugs, put on more size/strength, and keep more than anyone else I knew so maybe this helps some of you out. I don't pretend to know everything but a lot of trial and error (on myself although responsibly) yeilded this info:
-taper down to at least 15mg (for dbol) and I even go out a week afterward until I'm down to 5mg daily (people will tell you you don't need to do this with clomid and that it is outdated but then again these are often the guys bitching about losing all their gains from dbol. I would combine the taper and still use clomid.) Nobody used to bitch about losing all their dbol gains until clomid/hcg became super popular and nobody bothered to taper. This was the ultimate roid for years and it's pretty damn good in my opinion.
-concentrate on increasing key lifts (dead, squat, bench). You should be doing them naturally anyway or you have really shortchanged yourself. When you come off lighten up and decrease the volume on your assistance exercises. However, you should concentrate on maintaining these key lifts - like 4x5 weekly with relatively heavy weight. After 4-5 weeks you can up the volume on the rest of the exercises again and start training full force.
-short cycles - low dosages (took whatever I needed to gain and made an effort to train and eat as effectively as possible). This caused less interuption in my system and was much easier to recover HPTA and get back to normal.
-time off - I hardly ever exceeded 2 cycles per year so my gains solidified through natural training and my starting points were always natural (I find guys who use the time on/time off and then immed. cycle again lose lots when they stop for 6 months to a year unless they've used very moderate dosages and have been meticulous - this is probably why they don't come off for long periods)
-I also liked to stack compounds. I did this so that I could get the synergistic effects of multiple compounds and was able to get the same total effect with less mg's than using a single drug. I think nowadays most use it as an excuse to take more drugs as I see plenty of guys running full cycle dosages of multiple drugs.
-When stacking I always finished/tapered with an anabolic. Winstrol orals were a favorite. This allowed me to keep my gains from the other drugs while my body's HPTA returned to normal.
-obviously diet is key so eat enough protein but I'm not going to cover it here.
Good luck - hope this helps