When you're waging war with Dunlendings and an attack is on the verge of failure, make sure to abuse the rearguard rule.
For example, six dunlendings are attacking three North regulars in the Shire. If the Free people rolls all hits, you're dead no matter what, right? Wrong. Attack with 5 dunlendings, keeping a rearguard of 1 dunlending. If both sides score 3 hits that rearguard dunlending will be sole survivor and take the city.
Example 2: Two dunlendings attacking a regular? Your odds of taking the region when attacking all together are 62.5%. If you attack with just one Dunlending, keeping the other in the rearguard and flinging him into the fray only if the point guy dies, your odds improve to 76%.
And my favorite attack is to split off a lone Dunlending to attack the last regular in Lorien with Durin's Bane. That elf is Legolas and Galadriel led, so its a death sentance...but only if the Balrog misses. In case of failure the elves still have to spend an action die to sortie.