That's too bad as those are the two it would no doubt take
If you want both, my guess is that the Bruins easily pass. Even if Hertl is signed.
Where the Bruins currently stand organizationally, I would not give up either Swayman or Lysell. They are going to need young upcoming players. Acquiring Hertl would be nice, but there's just too many roster holes to make that a worthwhile acquisition at a premium price IMO.
Hertl will get a decent package, but things to consider.
1. Sign-and-trades don't happen. Unless SJ has granted the acquiring team to discuss a contract beforehand, no one is paying more than rental prices.
2. No more conditions on signings, neither team can add conditions based on Hertl re-signing.
3. Hertl has an NTC, which will likely lower the cost quite a bit.
My guess to whatever team he goes to:
Cap + 1st + prospect (depending on if the other team is allowed to discuss extension and by when).