Great game! Im the third person to beat the whole thing spoiler alert for last fight. I used Beorn Titus Alok Revere. I've got max gear and upgrades on Beorn, and tier +5 gear zero upgrades on everyone else. I just barely squeeked by with one hit left on Revere. I also swapped out for a powerful trinket on Beorn and changed his armor to attack power. Good luck everyone!!
Actually the Ctrl/Shift keys should work when placing or removing vendors as well.