To give a good idea of what kind of grid system I want, I want one like in Age of wonders II/shadow magic. It's a hexagon grid, with height incorporated somehow. Also, it has such a combat system, that when a unit is attacked, all the stacks on the bordering hexagons are involved in battle, and there's a stack limit of 8. This means that a 20 unit army would need 3 hexagons of space. There's a maximum of 7 stacks involved in any battle.