In fact, what I'd really like to know in this day and age now is: what is a Gowen thing?
Attack grims? Nope. Not anymore.
Falkow's got Black Storm and Eldritch hands, and always has had tempest and thunderheads (albeit waaay overcosted in both cases). It also has direct damage on open from lightning wyvern, and AoE damage from it as well. Not controllable, but, there it nevertheless, is.
Lawtia always has had good attack grims. Pure terror. Criminal edge. Now tears of blood. And I suppose you can call Overdose such a case as well. Oh, and the second effect of deathmaker, and sacrifice if you want to look at it that way.
Refess is so good with attacking grims now that it shares that trait with Gowen with Flames of Judgment. But...Hand of God, Judgment Hammer, magic bolt (and even unit support for it that fetches it back). And oh yeah, burning sun.
Gowen's schtick is...variety in low-level attack grims. Dragon breath, roar of anger, dragon fire, fire snake whip, burning air, fire arrow, and then some mid-range ones that absolutely suck (rain of arrows, roar of anger), and ball of flame I suppose is still good.
In the meantime, two of the other spheres have amazing effects with their non-damage grims (Falkow's returns, Lawt's SP drains) and Refess has general orders, sunbeam cage, key to the holy realm, and mirror of light).
In the meantime, Gowen used to be the "hit you harder and faster" sphere, back when SKs were pretty much a joke (oh hey look, two balls of flame, there goes the game), as were Carbuncles, who didn't yet have Diamond, Agate, Amethyst, or Jade (or amethyst eater). Oh yeah, and no OPsidian. And the only way to really do as much damage as Gowen was with pegasus WK, which, admittedly, was an absolutely amazing file, back when you could set it up on the back of a 60 HP elite (even 50 HP would work. Heck, even 41!)
Basically, the real question is: what the hell has Gowen gotten since pixies? The two Dilates, Jack, explosive wyvern, and flames of judgment. In the meantime, it's gotten nerfed on...well, just about everything it used to have in sets 5-8.