While my German army has 2 hunting tigers, 2 KTs, 2 Elephants, 4 Tiger Is, 6 Panthers, 3 Jagd Panthers, 2 Panther MKIIs, etc, etc, etc, the Sd251s are the crux of my German army. In my armor rules, each Sd251 can carry 2 troops. Versions with 37mm, 75mm, and mortars can still carry 1 troop. This makes them able to also tow an artillery piece with its crew, or to carry a superbly armed panzer grenadier.
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I line them up and on my 1st turn all the mortars and 75mm short guns fire smoke (which lasts for 3 turns). All the other Sd251s take off full speed. Blinded by a continous line of smoke right in front of them, the enemy is helpless to stop these halftracks from racing halfway across the battlefield and setting up thier 75mm AT field pieces and a few 88mm AT guns as well. When the smoke clears, the enemy is faced with a line of artillery all in critical killing range, and a solid line of halftracks charging them - all which carry troops or thier own AT guns. The enemy is overwhelmed by both numbers and the tough choice of picking off the halftracks or the guns.