A better course might be to ration the conflicts, and hand Milosevic logistical problems. If there's a fight, he may do well in the fight. But if he has to move troops around a blocked mountain pass to get to the fight, then the incompetence can begin to take its toll. Considering that Milosevic has been replacing generals with personal loyalists, there's a good deal of incompetence to work with. It is not to be pleasant to be targeted by a Rogue Leader, or to have the job of opposing one.
People crack under the strain.
Like the FBI specialists surrounding David Koresh at Waco, those with overwhelming physical superiority begin to feel besieged and helpless, and they start making mistakes. Many people have noted that NATO's credibility or even its existence is jeopardized if it can't succeed against this small country with outmoded guns. Since the Rogue's preternatural staying power is a given, it's important to prepare against that reversal of roles. The juggernaut effect. At his prime the Rogue appears unstoppable, but that's not true.