Originally Posted by
Orloth
So, souls auto consume when more than 5 become usable. The problem there is the default indicator doesn't do a good job of telling us when souls are actually usable, it tells us when they are on the ground. We have a WA to better track when the souls become useable, but I've found that doesn't even really work perfectly. Soul Fragments are just weird.
To your second question though, no not really. If you use Spirit Bomb when the indicator gets up to 5, you'll most likely get a five soul spirit bomb (rarely 3 or 4, sometimes even 6, but most of the time 5) It's generally more of a dps and healing cost to try and slow down and wait for the counter to settle then to just use spirit bomb when you've got "enough". Though if you've got an ability to use in between Fracture and Spirit Bomb, it does help to let all the souls land
Also, unless you are going purely for dps, it is better to let souls auto consume normally, and use Spirit Bomb when you take a big hit, or to keep the debuff up.