I would ditch the Battle in favour of any merlin engined single seat fighter that Fairey could produce either their own or Hurricane/Spitfire. I would not ditch the Typhoon jus make the spec for a griffon engine long range 4 cannon design. The defiant also could be ditched but if not ditched it should never have been used in combat within range of LW single engined fighters, it should have been kept in Northern England and Scotland freeing up Huricane spitfire squadrons for the real battle in the south.