The only reason Paix didn't play last year is because the Broncos were desperate to get him off their books. I think Madge is more open to picking him and getting as much value out of his roster so I expect Paix will be in the frame.
Kobe strikes me as the style of player Madge likes. A tough hard-working battler with a good tackle tech. It may not be a long term solution, but I can see Madge giving him that opportunity under his tutelage to see if he can take Kobe's game to the next level.
Smoothy could be an option down the line but I get the impression he'll have to fight his way into the team. Tyson is used to it and has never let a setback get in the way of NRL footy and I expect he'll be in the team come the rep season.
As far as Gosiewski a lack of alternatives really. I think it's a 'is what it is' situation, but if he can take some of the work-load off of Piakura and get some more value out of his squad, I'm sure Madge is going to take that opportunity. I could see Piakura transitioning into a lock forward role as well.
Gosiewski won't have huge expectations on him, if he can focus on his 1%ers and take his opportunities when they come that'll see him stay in the team.
We'll see how Koellner goes in Week 2, if he gets selected.