I'm sure your question was ment to mean, what compounds are easiest to recover from? To answer your question, Primobolan and Anavar are the easiest compounds to recover from, both of them also take the
longest amount of time to innitially cause shutdown of the hpta system. None the less both of these compounds will ultimately shut down the HPTA especially if you intend on getting benefit from them, as they are slow and steady gains.
That being said both of these compounds are also usually ran with Test which will quickly shut down hpta. It will take about 1 week on test to be drastically suppressed and about 2 weeks on test to be completely shut down. If your running primo or anavar only it can take a little longer for complete shutdown. But in all honesty when your shut down your shut down, so might as well run Test with them and get the maximal benefit.
Tren and Deca on the other hand will quickly shut you down. Deca or nandrolone to be precise, can shut you down in the first week even at low doses, and the metabolites of it stick around for long periods of time which causes further suppression after discontinueing injections.
Deca and tren are the hardest to recover from and overal take the longest.
If your looking for fast recovery stay away from Deca and quite possibly Tren as well. I personally love Tren though, but thats my opinion, many others hate it.