You're very welcome, resort-sand.
I just after posting saw your answer, I had already set this up, then I had to join a meeting. Sounds great 🙂
I will share my prepared post anyway.
The simplest way is just a Data mapper, lifetime to Radius. But that is not along your requests, as it sets the fade in, fade out to various lenght, if the life time varies. An exact frame number for all individual particles is not given. If that is not a problem, here is the simplest way.
I left an alternative in it, with a ramp.
CV4_2026_drs_26_PAdm_01.c4d
The beginning is simpler, as all particles start with the first frame; they are "born" and age from there.
To keep it simple, that can be done with a Condition.
Example:
CV4_2026_drs_26_PAst_03.c4d
When the growth period is over, it gets moved to the next one, which is the same as the one above, discussed with the problem of variance regarding lifetime.
Is this working for you?
Cheers