While I did not get a chance to use it myself,
I was running a Legend in Festering Ground last night team was…
Ironbreaker with Axe+Shield and Flamethrower
Sienna Pyro with Conflag
Shade with Volley and (looked like daggers but could have been dagger sword)
WHC with Falchion + Volley
We had a TON of Hordes on that map and even wiped out a Chaos Patrol (which no longer has the enormous amount of CWs, so between me (WHC) and the Shade and shockingly the Conflag Wiz… it was actually doable when it was accidently agroed by the Mage.
I watched the performance at multiple times through wave after wave of Hordes and between that and the Flamethrower (along with my Volley)… regardless of all the hair raising situations. It seriously made a difference.
Kill totals were a little screwy though Bardin’s Flamethrower ended up netting more kills, (around 400)… but Sienna’s Conflag still netted around 270 along with my 270 as WHC.
So it has improved a great deal. Prior any Wiz that ran with it would be down in the 100s somewhere.
Even saved Bardin when he accidently fell off the ledge before the Bridge over the water… during the first dropdown through the second cave (Grim Pickup) when a horde sprung up on him. She was safely able to Conflag the Horde while he defended against the waves and the rest of us kept them off the ledges.
So it has indeed drastically improved over what it used to be.
Not sure how it compares with the other staves at this point, but there were improvements.