Rule 1 - FLY THE AIRCRAFT.
Selection of TOGA is SOP for some operators - yes you will be adding fuel to the fire - but the increased performance will get you to 400' AGL quicker to allow actioning of ECAM in a failure case - with fire the engine is still producing thrust so performance is less of an issue compared to EFATO.
Provided the aircraft is under control (Trimmed, AP in, HDG/EOSID established) it is permissible to commence ECAM <400' but only in exceptional circumstances - FIRE is a good example!
The fire is dealt with by ECAM, not from memory actions. It is a controlled and deliberate sequence requiring good crew cooperation - because you DON'T want to get it wrong!
A4