oh so i have to use the 200 supply and then i should get 3/4 of AC?
The army controller shows 52 units. In its current state it will only display those units who fit into the 5-level pyramid. If you produce more than three level-4 units, only the first three will be shown in the AC.
Because titans have a supply of 10, unlike e.g. workers who have 1, you can produce up to 20 titans by killing all other units in your army. Only three of them will be shown in the army controller, plus one more if you level one titan up to level-5. In this case he uses the one level-5 slot
A new army controller could show all units but it would need smaller images for level-1 units. Technically this is a lot of work, too. At least thats what those who have tried to do it told me so far
Maybe one day...
To use the old 52-units-armycontroller in 200-supply games, turn it on in the main menu -> settings/options -> turn on army controller