The best way to handle the problem of bandits would be to do so with a small elite force, the reason why Rezar didn't really need anyone finding out he was alive and back would be because he knew there would be a frantic squabble to stake a claim in his territory before he got properly acclimated to the way his kingdom had changed in his absence. So rather than cause a frantic scramble for a piece of the pie that was Morte Bianca, it would be better to take them out one strike at a time, and now in this case they would be the pie, and he would eat them up one small nibble at a time.