She started out fast enough to impress Diana (a bullet-timer, but not Flash, so we'll put her in the "kryptonian-amazon-martian" echelon). Later, though, Rucka had her "learn super-speed" from Zoom, and when she fought Wally he had to temporarily steal her speed to stop her running rings around him (not that she should have needed to - she's like a hundred times stronger and pointier than him, she shouldn't need to be even *as* fast as him to pose a threat). Egg Johns and Rucka's houses if you don't like it, I'll happily drive the getaway car. :/
Secondly, not that you're a Thor expert, but isn't the lightning that can be channeled through Mjolnir godly lightning? Wouldn't that do like , D&D x2 bonus damage to Clark?
Prolly. That's the lightning, though, not the hammer itself. The argument refers to normal blunt force trauma.