I think a secondary front liner would work well counter barbarians. However if desired my char could cast fly on himself and be outside enemy reach to be hit besides ranged attacks. Also ideally if possible gather enemies around to closer area together so I can cast fireball on them and hit them all (without hitting an ally). Also, Mirror Image can do wonders block some hits coming Berg's way. Also, drows can racially create darkness, so can block enemies' vision with it and force them come closer or bottleneck them a certain spot. Alternatively, use faerie fire so everyone gets advantage on barbarians (if cluster them to hit them all).<br/><br/>Also, Berg can turn 2 people invisible with an invisibility spell (so can get front liners closer to the front before the fight starts). My AC is 15, but can as a reaction raise it by +2 or +4 to my save vs attack (but this applies only an attack or spell which I am failing already). If after fight take short rest, can recover one 3th level slot, 2th and 1st or three 1st level slots (which I could use for magic missile).