Get the holy water. There's always at least 1 safe box of it around his hideout(a different box marked with a Medic/Redcross + sign) and it works quite well without wasting a totemslot or cd.

Also, while not technically a solution to your skele issue, there IS one other thing you can do to up dps on Baron for this fight: Medallion of Faith. Either get it from the Archivist's room in Live/Scarlet side of Strath, or buy one off the AH, and give it to the dude in the Chapel right at the Back Door entrance to Strath; if you do(and only 1 person can per run) he'll show up and help you kick Baron's ass midfight. I didn't know this till I triboxed it and turned it in for exp/rep purposes only to be surprised when I aggro'd baron to have a human paladin show up out of nowhere and start smacking Baron around.