I don’t play milsim but I do play Age of Wonders and find the oblique order works better. Hannibal put his strongest units on both flanks. Frederick the Great

I don’t play milsim but I do play Age of Wonders and find the oblique order works better. Hannibal put his strongest units on both flanks. Frederick the Great put more units on one flank, and when that broke they crushed sideways along that end of the formation. Unzippering the entire front line. It also, I suspect, put the opposing general in mortal danger sooner, since he now has to retreat when the battle is only half over. Having your strongest on one end means you can’t get separated into two groups. Unlike a game with an omniscient general you risk losing communication with half your army if things go poorly. But it’s more common in games, where the general is omniscient and fatigue does not exist (so running across the map takes time but not energy), to see the lines fall back at a diagonal, forcing the enemy to chase down the far end of the formation, while it falls back to the center and the center joins the flank. By the time the battle is fully joined, the overmatched flank is nearly defeated, and the formations can roll up on the enemy’s center within a turn or two, while the rest stalls for time.