For people to ask you to combine rules you must be carrying a rule that is not in that region. The easiest way to do it is to play a game in Galbadia so you're carrying their rules (which should be Same by default), then play a game in Dollet. You'll be asked to mix rules, say yes, immediately quit, and hopefully something will either spread or be abolished. In this case you want Random abolished, so keep reseting until it is.
I always abolish every rule from every region I go to except for Open and sometimes Same. This makes card games much more enjoyable, and allows you to play against your opponent instead of the rules.