If I am reading this right, can people just not dodge this hit with dice at all? (Assuming only one or fewer crits) Or, does one over-ride the other?

Autoblaster -

Your hit results cannot be cancelled by defense dice. The defender may cancel crit results before hit results.

Ten Numb -

When attacking, 1 of your crit results cannot be cancelled by defense dice.

No, those two do indeed work together.

However, if you roll two [critical] results, then your opponent may cancel one of those, as Ten's ability only affects one.

That combo indeed works, and comes in the Wave 3 B-wing pack.

Sadly, it also sucks. Ten Numb is very expensive, and the B-wing's dial isn't great for getting him to Range 1 to use his Autoblaster. 36 points off the bat for a very hard (or at least unreliable) combo to actually use.

Wave 6 is the wave that brought Ten Numb back, because it brought Mangler Cannon and Calculation. Equip Ten Numb with a Mangler Cannon and he's almost certain to punch a crit onto whichever ship he shoots at any Range, even if that's a cloaked TIE phantom with a stealth device behind an EM emitting Raider Corvette rolling eight evade dice.

He's too expensive for what he does and too easy to kill because of only one agility.