Really depends, they all have their ups and downs.
Daikōdan eats chakra, basically like a massive Preta Path monster. Perfect counter against chakra made shields like Susanoo (Any version under PS). Unfortunately as far as destructiveness it goes it featless, although considering how much it offset Hirudora, it should be above FRS level.
Amaterasu burns the target the caster his his sight on, for the most part, only High-Kage + Ninja have a counter to this. Absolutely no destructiveness though.
Hirudora has arguably the greatest potency out of all of these, being capable of destroying V2 Susanoo and leave some damage on Madara. Its also a very fast attack and can be used at anytime (Does not need to be in gates to use it).
Kirin is also deadly, but the amount of prep it requires makes it impractical, especially considering its only able to destroy Ribcage Susanoo (Granted could injure the caster significantly in the process). Also impractical in the fact that if the opponent gets close, the attack will end up hitting the caster as well. For an attack that is only slightly more powerful then FRS, its not that great.
FRS is a decently powerful attack, its probably the least destructive out of the bunch (bar Amaterasu of course), but its fast and does damage on the cellular level, so even if a human has a lot of durability, it gets bypassed.
Overall efficiency, I would class them as follows:
1. Amaterasu
2. Daikōdan
3. Hirudora
4. FRS
5. Kirin