I mean, if people want it to be done legitimately, give people an idea of what they might need to do so accommodations can be made to fit that, whether that's chat filter settings or places to safely practice the reactions, etc. Don't complain about people using a solution without providing one yourself.
1) Use battlemod or in-game filters to filter out auto attacks, evades, etc. You don't want your chatbox flooded w/ nonsense... you want to be able to see monster actions clearly.
2) Adjust the color of monster actions text to something unique and eye-catching.
3) Set up your macro palette/key binds so you have all six barspells in a row, ready to go. You do not have time to menu-cast. You do not have time to fumble around. You literally have 1-sec on an average NA/EU connection to hit the right barspell after you see the warble element message. Those closer to the server may have a bit more time.
4) Petrify from Stone Meeble Warble is the one that will really *** you over if you miss it, so keep barstonra up between warbles as a safeguard.
5) Count down 30 seconds until the next warble.
6) Keep your camera turned toward the center of the battlefield to watch for the housemaker. If she comes running, you need to get 20' from your party. Paralyna yourself after you get hit.
With all this said, barspelling is completely optional. You can full-time barstonra and just esuna everything else off. If somebody can accession/perpetuance Regen V before entering, it really takes the edge off the warble DOTs.