I've yet to do this, but this sounds more like the case of "easy unless people don't work together/listen to advice and instructions." That was certainly the case with my first time in Chrysalis. Did some research before the run and the mechanics are dead easy to follow, but (not accounting learning the fight and getting into the flow) despite some instruction given as progress went, some people did things contrary to what they were told. :T

In short, the trials aren't hard, people behind the keyboards make it hard.