If you never want to come off do this...
Cycle androgens for 8-12 weeks
Then...
Cycle anabolics for 8-12 weeks
This will give your body a rest from each and you never really have to come off... Get your big gains on androgens get solid and hard on anabolics... You can also bridge with anavar primo etc...
But I wouldnt go longer than 12 weeks on one or the other unless you are doing one big cycle that conbines both with a taper like a 16 week bulk/cut cycle... But that is basically the same concept I am talking about...