Downrigger question

HI Guys,
I wasn't sure where to ask this question so I hope its in the right place, if not maybe the Admin will move it.

Those of you that include downriggers to your setup, what size line do you use? I had a break off last trip out and decided its time to replace the line that's on there.

I haven't used down riggers for 20+ yrs but d/r line is ss wire now on the dr rods I used 30# Power Pro or 20# mono

I use 20# line on the central basin of erie. this yr I'm using seaguar invizx and it seems to be working good.