FNF (Round 2): M3 result and M4 combatants

Round 2, Match 3 results

This is another fight that was hard to call...not so much because the winner is doubt.  I just don't like the outcome.

The Veiled Avenger clearly has the advantage in hand-to-hand combat skill.  She's pretty masterful with that whip.  She's repeatedly used it to keep larger physically-imposing males at a distance--even when they're armed with pistols!  If any ever do close in on her, she's demonstrated hand-to-hand skills that are at least as formidable as Ion's.

The core problem is simply the power differential.  First, the fight takes place out doors.  Consequently, there's nothing to stop Ion from taking full advantage of his flight ability. Second, even when he closes in on the Avenger--and even if her reflexes are fast enough to lash out at him with her whip--it apparently takes quite a lot to penetrate his force-field.  Though it's never defined precisely how much, I've got to believe it's more than a bullwhip, no matter how skillfully wielded.  At the end of the day, even when the Avenger brings her A-game, I'd think Ion just wears her down.  (And the kid has demonstrated the guts to take a punch and carry on the fight, so I'd have no doubts about Ion's grit.)

Apparently, the voters agree.  It's unanimous, Ion goes to the third round!

FNF (Round 1): M5 results and The Veiled Avenger vs. "the heroine"

Round 1, Match 5 results

Ion vs. Mad Dog

As I see it, the outcome of this fight would probably come down to an issue of whether Mad Dog could seize the element of surprise. 

Both the combatants have super strength...but Ion is a teenager, whereas Buzz Baxter is a former Air Force colonel.  In terms of raw fighting skill, then, I'd have to assume Mad Dog's superiority.  You might argue that his insanity reduces this advantage, but the legendary battlefield prowess of the Viking berserkers blunts (if it doesn't completely invalidate) that argument.

If Mad Dog gets the jump on Ion, the next critical question would be whether he could pierce the teen's forcefield (especially with his fang venom). It's difficult to determine this. According to Wikipedia, Mad Dog has bionically strengthened jaw muscles to increase his biting strength, so that might make you think the Mad Dog could take him down if he could get into a close-quarter row. On the other hand, though, Ion's forcefield has been demonstrated to be powerful enough that a baseball bat cracks over it without hurting him. Even a point-blank blast from a gatling gun does nothing more than "leave a welt."
Thus, even though Mad Dog theoretically could puncture Ion's forcefield, the fact that there's nothing in the specified text of Solo Avengers #9 that would seem to demonstrate his bite power, whereas MOST Comics #1 does show us a super-robust forcefield for Ion.

Despite being a knock-down drag out, given the issues cited above I'd give the slim advantage to Ion.