As a formality, they would almost certainly waive Kubalik and Brannstrom before attaching a pick to them. I think outside of a lucky situation where a team loses an NHL defenseman to injury, both of them would clear.
A 2nd to dump about 3M (both contracts buried) of cap x 1 year is fair. Closer to the deadline, it would probably be cheaper. Seeler, is probably worth a 6th or 7th round pick since he can play NHL minutes as a defenseman. That's usually the market for those guys.
One of the only other ways out is for a star player to have a season ending injury so that they can use the LTIR pool to sign Pinto and fill the roster out before they have a more difficult road schedule travel wise starting in December. The problem is that they cannot control that.
There aren't many reasonable alternatives short of a bigger hockey trade with a player people probably don't want traded like Batherson or Zub. Or, attach a 1st to Joseph, which would be considerably worse than attaching a 2nd to Brannstrom/Kubalik.