Keeping Assault Engineers in the call-in is also a nice excuse to fix that waste of a unit for other doctrines too.
Geez, you have got such a vendetta against assault engineers... they're excellent units whose biggest fault is being doctrinal and not replacing REs.
They can be timed so that an assault engineer and riflemen are hitting the front by the time sturm pios and a kubel are on the front.
Since the theme of all this is teamgames, assault engies routinely give me, to speak for myself, the edge on maps where you have to rush key garrisons. Which is, like, every teamgame map that isn't steppes.
I don't feel like you've properly defined why you feel so strongly that they're such a waste of a unit.
They do have less use with nerfed demos and RE mines, but still. Flame. Throwers.