^^^ no you don't need test in every cycle.
the reason people think that is they think that you get shut down without test. test will shut you down as hard as any AAS out there. go on testosterone for a year and i guarantee your LH will be near 0. you will be 'shutdown' hard. just like if you ran any other AAS, same thing. I don't know why guys think test keeps you from getting shutdown.
i've gotten into debates with guys on this site.. UA Iron is one of the guys. doesn't post much but one of the most knowledable dudes on here. he still months later hasn't been able to give me concrete evidence showing testosterone doesn't shut you down. if anyone can give me concrete evidence that test doesn't shut you down please bring it forward. i would love to see it.
bottom line is using test as a base will add more fuel to the fire. its more juice in your cycle. really it depends on what you are using.. if you use tren for example you definately don't need to add anything... tren on its own is what 5X more anabolic than testosterone? so why would you need test to get results? with something like masteron or proviron yes you need to stack it cause you need that anabolic kick. primo is probably the same way, it can help to add test to it for an added kick.