When to use Flare?

[StubHub]

Yup! Good thing it's really easy to do once you get a feel for it as the window is exceptionally forgiving. A few minutes at the training dummies and anyone can get it down.

I've seen comments like the one in bold said numerous times. Along with other things like people counting the 2 seconds in their head. Are people guessing or using an internal clock? Are people unaware that you can just use the umbral ice buff timer to see your 2 second wait time? i.e. You get your tick at 8 seconds on your UI buff, you would start your cast at 6 seconds on your UI buff.

Just throwing it out there because i've seen enough people say things that lead me to believe they are kind of guessing at the 2 second window when the game gives you its own timer to use.