OK, does this seem like a reasonable plan for Isengard? Build an army breeding goblins with orcs to make Urukhai and start up forges and training at Isengard as well as improved defenses. Then to counter Rohan the nearest threat, you would build up on pikes and defenses against horses, as well as rallying dunland men to burn villages and attack people. Here, is my difference from the movie. Why didn't Saruman attack Edoras knowing that the main force was at Helms Deep? Once there he could use it as a fort, and then sally forth to block not attack Helm's Deep until they starved out or escaped through the tunnels in which case you could then take and hold Helms Deep. Now you would have all three and begin to start more breeding pits and training halls with forges at all three. Where did I go wrong in strategy?