The one thing that would help answer this question is the fact that when works are shown here in pics ; it mostly focuses on the sculpt or painting and not the overall balance of the piece which includes the base.
So I don't think you would want use a thin rod and a block of two x four on a well done painted piece you've put hours into.........There are many options when mounting a piece;but most revolve around creativity...........Visualize the overall finished piece including the base and do whatever suits your fancy.
(to quote the Moody Blues...."Thinking is the best way to travel"................unfortunately,I don't always adhere to that.....Oh well,just trying to help.............................Regards,..Wayne