In most case. Vrs fire resistant troops, very highly armoured troops and SC's(afflictions rock

) and possibly in other cases the death bless would be better. The fire bless does more damage but the fact that death does AN damage and gives very high chance of causing afflictions gives it an equally useful job. Although, as i suggested taking both would be fun but i have one question:
would the extra affliction chance extend to the damage caused by fire bless? if so that would be very nice on warriors of the 5 elements (who previously i only used with f9/w9 for great speed, stats and damage) whom i have grown rather fond of.