Eruption is currently not only hitting harder than it should (not splitting damage) but its also hitting way more often than it should. An aug casting eruption once is able to hit 15+ times from one cast, each doing 1m-2m damage each.
Its likely from the 2pc tier set. This is clearly unintended, and aug can do upwards of 30m+ damage in one global to the entire team.
Until this is fixed. I will be making a thread here and in the bug report forums.