At the moment, it is rather difficult for the brits to capture the front lines. The beaufigther alone, issent enough to silince the Pak40"s + flak18+Marder.
The imbalance with this map lies, when the british finnaly capture Mareth. From their on= The germans get one tiger tank, one Panzer IV ausf F2, and 2 Panzers 3. These have to face 6-7 shermans and 5-6 Crusader MK3 + 2 Deacons. My advise
1.Additional marder spawns in Upper gabes
2.Another Panzer III ausf J1 in Gabes
3.More defenses
Normally, i defend the British, because they always have a hard time playing, but once Mareth is captured, the Other flags soon follow.However, i saw many times where the Germans now got out of Gabes, winning the hell out of the british