Safest best etc is really not something you can comment on, as it differs person to person.
Someone may be able to take 500mg test & have no problems, others may have problems at that dose but be fine with 1000mg Deca.
If I look at tren, I get sides. But I can take 2g test & be totally fine.
However, low dose test & GH is most likely to be the most user friendly long term stack for most. Add in a little femera & some Avodart & you're gtg.