Fate’s Whisper - 75 sub-class quest

The ToI part;

Take the soul orb back to Maestro Reorin, he will ask you to go Tower of Insolence to kill 3 Raid Bosses to get 3 Infernium Scepters.

What is the respawn time on each of these bosses?

Tower of Insolence Third Floor - Hallate

Tower of Insolence Eight Floor - Kernon

Tower of Insolence Eleventh Floor - Longhorn

16-20 hours is what I've heard - but it's not confirmed by anything official.

Does anyone know if these RB must be done in some particular order?

The ToI bosses can be done in any order. I did Kernon, Longhorn and last Hallate - before the sucky wait for Baium ><.

I have since heard that its 18hrs for the 8th and 22 hours for the 11th

However last night it appears it may have been 14hrs for the 8th..

17 hrs for the 11th

Any other takers on the times

Well there is no set time for any mob to respawn. instead they have a window once the timer is up. For a regular mob this is a second or two but for raid bosses much longer and these high end raid monsters you can have up to 8 hours of delay for some such as baiumn and antharas.

From what I saw it was around 12 hours.

From what I saw it was around 12 hours.

yeah i think thats about right
i think it has a random timer of about 6 hours