We made a strong argument, but it seems the Crownlanders are won over with the idea of Bathory. We need to provide something that cannot be offered by the Transylvanian Prince, and that'll be hard to do since the opposition is correct in that Matthias is untested whilst Stefan is a proven ruler and capable leader.
I do not believe the Archbishop declaring a new king personally is a good choice. It's begging for a civil war, as the choice to vote is torn away from the Crownlanders, who will personally see it as an affirmation that this new Habsburg is a tyrant and wishes to revoke their Golden Liberties.
Coaching Matthias might be a good option. He needs to stand on his own two legs, and not be a puppet, however, and us endlessly coaching him could be seen as pulling his strings. This will not be a good view to those outside the Lithuanian Camp.
The Counter-Bribe I feel is a very promising route. Establishing that Matthias will offer up the same amnesties that Stefan will is a good baseline of breaking up Zamoyski's camp, but it will not convince everyone alone. Yet, it is the only option I can see that doesn't deepen divisions to a ridiculous degree, whilst simultaneously getting us closer to the goal.
The Prussians and Danzigers do not vote for the King, to my knowledge. Any support we could get from them will probably be more material and in spirit, than in tangible political influence. I think this is the second worse option behind the Archbishop crowning without a vote.
Agitating the Piasts doesn't achieve anything. They're a camp we're trying to sway to our side, and riling them up to prove a point to Matthias is antithetical to the goal we have of getting him elected.
At some point we will need to parlay with Zamoyski, but I do not believe we have a strong hand to play at the negotiating table. We should always keep this possibility open, but we must strengthen our play before doing anything of the sort, I feel.
All in all, my preferred choice in the matter is the meeting with the Zborowski Brothers..
[X] Introduce the Archduke to the Zborowski brothers.
Does my assessment sound accurate to those more knowledgeable of the political climate of the era?