Mobile formation flank and rear protection

[Zoetermeer]

I need that motorized infantry at the front though! Most of the panzer divisions only have a single flak unit, although looks like at corps and army level there are more of those assets, 88's and so on. I've used the towed AT gun units occasionally, although I think I remember reading that those do not have a ZOC so you can't space them out like you would with other units.