You know your party needs to do more damage if you die to an enrage cast, so the game already informs you if it's insufficient.

You can test your DPS for content with an enrage using Stone, Sky, Sea in Heavensward, The Circles of Answering in Stormblood and The Lawns in Shadowbringers, where you have to defeat a striking dummy within the time limit.

In any other content, it's a chill game and Yoshi-P just wants you to have fun and not worry about being perfect, unless you enjoy doing that.