I wouldn't go higher than 200mg deca per week if this is your first time with it.
I've never had gyno issues, but I introduced 250mg deca with 375mg test and within 5 days my left nipple started getting sensitive and their was some pain behind and above the nipple area in the breast tissue (pec).
I stopped the deca a week later after realizing arimidex and caber were not stopping it, and it's been a week since the last injection and the sensitivity is starting to diminish. No apparent visible gyno thankfully.
I was using arimidex AND caber and that didn't stop the sensitivity at all. Despite people talking about controlling estrogen being the key, I had mine under control.
I will admit my joints in general feel good. I'll consider using 100-150mg a week in the future for therapeutic reasons and a little boost to a cruise, but I don't think I'd personally go over 200mg a week again.
We all respond differently. I've used 750mg sustanon a week with no ai before, so there are no blanket answers for everyone.