No LST would land while the beach was still contested.
Too big and soft to land while under enemy fire.
They used LCT's for that. Landing Craft Tank.
MK1 = 4 vehicles, MK2 = 6, MK3 = 8, or MK4 = 12.
They were steel not wood, and open, so the Vehicles could
fire their weapons from the craft as it approached the beach.
It was fitted with 2x20mm Oerlikons for AA. Also mounted
heavy batteries of Barrage rockets!
The Brits and Canadians used them at Dieppe to land
the Churchill tanks under heavy fire. They made it to
the beach OK. Tanks just couldn't get over the sea wall.
So, say AH3 introduced a MK2, that would carry 6 vehicles?
Load it with 2 Wirbelwinds and 4 tanks. Giving 10x 20mms,

With the fleet close at hand to give puffy ack cover?
I think they would do very well!