Um, correct me if I'm wrong, but at least with the wording, his barrier passive says, "buffs earth, wind and fire if a barrier is active" now...this doesn't neccessarily mean that it's his barrier. Maybe it's just worded wrong, but if it's worded correctly, then it means that you can launch another barrier, and you can get not only the buffs from that barrier, but also onoki's additional buff because a barrier is active

I don't know. I understand that barriers cancel each other out, but onoki is the only one to say "if a barrier is activated"