I've noticed that when I have the Soujourner's Sash, any mana-providing items (either the Tablet or the Band of Mana) essentially "flash" their durability bar, as the sash grabs some mana and the band of aura immediately replenishes it.

Now, this causes some mana loss (which can actually be substantial from what I've seen) when hanging around a Spark with an Augment: Dispersive, as the spark attempts to "feed" the tablet or band of mana, but by the time it would reach the player (whether or not it's actually instantaneous, regardless of the animation, doesn't matter), the band of aura already has done its job... And this repeats after only a very, very short time. I'm tempted to say, regardless of the way the flashing actually shows, that this actually happens every tick or so. Not sure what the size of the burst is from a spark but if it's anything like when it feeds another spark, that's a whole lot of wasted mana.

Suggestion: Hardcode the Band of Aura to feed the Sojourner's Sash directly (and, possibly, also the Globetrotter's Sash, though probably only from the Greater Band of Aura), and substract that from the mana fed to the tablet or band of mana. This would ensure that if no other mana is actually being used, the tablet or band are never triggered, which removes both the visual "annoyance" as well as the loss of mana from a Dispersive spark.

Oh, also that would actually remove the need to have a tablet or a band of mana at all, if only using the sash. I'm not suggesting this could repair items or armor - that part's perfectly acceptable as it's not happening every tick!