The idea of "lean" mass really comes down to diet, so you can use most any steroid and stay tighter looking. Of course you probably won't look ripped on anadrol, but we aren't talking ripped. We are talking "not sloopy". You could go a few directions. One of the classic cycles to consider would be Test/Deca/Dbol. This combo is likely to add a decent amount of water in the first month or so. If you are naturally a skiiny ecto body type, you can probably handle it. Guys who have more body fat are going to be more likely to gain more water. Another drier option would be EQ. It will have a similar effect as deca. Good for mass gains, but there are also fewer sides, being that it is not a 19-Nor based compound. So less potential sexual issues. Sust 270 would be a great option. Its probably my favorite test by GP.  I'd keep the structure the same as your first cycle. 12 wks is a good time frame. Sust 270, 2cc EW along with either 400 deca or EQ EW. You could use Tbol again if you like it, or if you don't mind a little more water and want more fullness and pump, dbol would be good. Dbol is my personal favorite mass gaining oral. Of course, you will want to use a small amount of adex to control estrogen.