With anavar included in an oral cycle the gains can be kept. Primobolan could provide a similar effect in that sense as well.
Those doses are very low as well, minimizing toxicity. But also limiting gains. Toxicity gets worse with duration though, so either way this proposed cycle doesn't seem so bad as far as toxicity goes.
Still doesn't mean this guy is read for a cycle or not. There are lot of holes that can be punched in it.