Dr Grant wrote:
I can't stress enough how important it is for all the players to get into the spirit of the game, the evil player SHOULD be throwing everything into the attack right from the start. It's not much fun if he uses his knowledge that the good are turning up on turn 11 (which the orcs shouldn't know) to set up an anti-cavalry 'net' for when they arrive.
The thought I had on that is to have the defender choose which table edge to have reinforcements come from at the start of the game and write it down on a piece of paper, 3 turns before the reinforcements arrive, have the attacker roll to see if they have noticed the approach of the reinforcements. If they do then they get to look at the paper with which edge the reinforcement will be coming from written on it; thus they can set up a defense and if they fail to roll then they won't know until they are deployed.
This throws in some randomness to the battles. Of course this is more on the generic side of siege not really directed at Helms deep.