Just for the sake of it, would you consider moving things around?
Three strikers & two light SRMs gives similar movement profiles, all wheeled. Sure, the IF capacity drops, but anyone coming around the hill they're hiding behind will be surprised.
Then the Von Luckner, Hetzer, and the two Hunters, plus
- DA era, can't go past the Testudo.
- a Schrek or Demolisher always appeal.
I'd probably pick the Schreck for the extra range, and no-one can complain it's not a hard hitter. I'd have the two assaults forward, with the Hunters & Hetzer keeping their flanks clear.
Shame you can't easily get the Von Luckner K100 on a Marian list ... with the right DA piece, it's an easy mod. ;)
W.