The reason this level is so long, is because it can't be speeded up. The level will always have the set time of 20:21, so it's only a matter of staying awake... ;) Well, I'm just creating lots of Canoes and War Canoes and put those at the enemy spawn points to intercept their boats, so they can't even reach the shore to drop off some units. There's no way they can ever capture the Redoubt. All other things I do in the level is just a bit of XP gathering and such, and that's about it.