If it has been correctly reported regards the unfortunate crash of Eurofighter DA6, then it would appear that there is a gap between the time emergency power is available, and the time to achieve a satisfactory re-light in the event of a double engine flame-out.
Reportedly the removal of the cannon armament has resulted in the addition of lead ballast to retain a satisfactory C of G.
It would appear that this spare weight could be more usefully utilised by the addition of extra emergency power, probably in the form of extra batteries, which could then power the Secondary Power System(SPS) until the aircraft descends to such an altitude as will permit a satisfactory relight.