stand developing
Start with normal agitation first to establish a baseline. Then see if you want to do variations on the theme. You'll find (if you search this forum) that 'stand development' is a rather contentious topic.
Should I decrease the speed if I use standard development times then? When you say slightly would you say around 1/3 - 1/2 stop ?
With Rodinal I'd suggest overexposing by about a stop, but it depends on what kind of film you use. When I used Rodinal, I mostly shot Fomapan 100. That definitely could do with the extra stop of exposure.
Personally, I'd pick Pyrocat over Rodinal.