The Ta 154 is something of an exception to use of wood on aircraft. By 1944 most German aircraft had a high wood content. The Me 109 often had a wooden tail assembly. Flaps and control surfaces on many aircraft were wood. Propellers were being made of wood.
But, the Ta 154 was also not a light weight low cost fighter of the sort I was suggesting.

As a general guide, the aircraft I was suggesting would be more like a slightly smaller Me 109 designed to use several different readily available engines. It would have say a 20mm and two 7.9 mm MGs for armament and be capable of carrying a small bomb or two or some small rockets. The outfitting would be as austire as possible.
Its primary use would have been as a cheap replacement in the field and in theaters where the Allied air threat was less serious. It could also be used as a ground attack aircraft phasing out such relics as the Ju 87 completely.