Personally the ''fastest boss kills record'' to me is garbage right now because every boss is killed within seconds due to having multiple players at the boss and whoever did the most damage will have the record.
It should be changed so that a player must have done 100% damage to have the fastest record for killing said boss, damage dealt by multiple people will not count and there will be no set record.
Boss records could easily be 1-3 seconds if you have a mass of people which i think devalues this whole record thing.