precisely. everything is good with the build until another portal barb with a red TP rolls up and portalmogs the fuck out of you. that's the only thing i've seen defeat my portal barb so far but it was more a spiritual defeat. the combined dps was astronomical.
Imo having 2 portal barbs in the same game completely defeats the purpose of the build. Especially, because we all know the optimal strategy is to have everyone together in a party and then the portal barb in a party by itself. Otherwise people will accidentally click on your portals and they won't get exp from your hard work. I've had many people complain before because their PC will lag from my portals, but they sure stop complaining after we finish each baal wave in under 1-2 seconds each.