Yes, a good rule of thumb is that most guys can take 400 mg/week of Deca without having much mood problems, but usually (not always) a higher dose will cause mood problems and often severe libido problems. For some individuals, that can show up at less than 400 mg/week, so it’s variable.
If using 400 mg/week Deca, you’re getting pretty good
coverage of androgen receptor mediated activity. You could
get somewhat more by using another 400 mg/week of Primo
on top of that, but unless well over your natural limit
you should also be able to make good gains without that
if you are using Dianabol as well.
If using Primo only, 400 mg/week is a reasonable minimum
and if you can afford a gram, go for it!
It’s not really that you need more “each cycle.” You need
more the further you get over your natural limit. Uf for
example you’d done a bunch of cycles but then for some
reason, e.g. sickness and not training, you lost all your
gains, “even though” it might be your 10th cycle, you’d
be set up for superfast gains without doses having to
be super high. It’s not how many cycles you’ve done, that
really has nothing to do with it though many people in
bb’ing say that it does (not having thought about the
above fact or understanding the physiology and biochemistry.)