Isn't that more like a property of Svarog rather than Fire as a whole? Though, I guess Uriel is also plenty capable of storing a boatload of Burst damage (at least until the cap hits, any Uriel users care to comment?), whileas Svarog takes the whole team much closer up there.

I suppose Ares, once Awakened, will have extreme chance of doing combo attacks on fire too.