Yes, a bottom 4 RD who can PK well would definitely be nice to add, especially if Byram is out for the season, so Braun would likely very much be of interest.
That said, if Helleson does well at the Olympics there's a chance Sakic tries to sign him asap and give him some games prior to the deadline to see if he can fill that role. He plays exactly the role the Avs need right now, the only question is if he would be able to handle the responsibility of playing in the NHL so soon, particularly if he's expected to PK.
Hall with a NMC only fetched a 2nd and Björk, which is more or less equivalent to 2nd + Jost. So if Giroux flexes that NMC it might be possible to get him without giving up a 1st.
As for Braun, with so few 2022 1sts available (ie. Florida, Carolina, Vegas, and Carolina already traded their 1st's), and with a saturated market both for Dmen and forwards, realistically he'll probably only fetch a 3rd or 3rd+ at the deadline.
Combine the two and you get a 2nd + Jost + 3rd. That's probably a bit low, so alternatively with Braun included you can bump the 2nd up to a 1st and go with a 1st + Jost and maybe a lesser prospect (eg. Bowers). That way Philadelphia ensure themselves of one of the few 1st rounders on the market despite having little leverage due to Giroux's NMC.