Originally Posted by
Rein_eon_Osborne
It's not impossible, but I wouldn't call it 'easy' since having a firsthand experience on playing said classes may also play factor in judgment (aka knowing their kits). It's not something all players willing to do: play all/multiple classes.
I.e. 120s is a common next raid burst window in most encounter after starting a fight. If said player have played multiple classes and have some knowledge of their kits, it's quite intuitive to expect seeing the 20s, 30s, 40s, 60s, and 120s big damage button/raid buff icon coming out at this very window because they all line up perfectly at 120s mark. Not seeing one or few of them could indicate some room for more improvement or a mistake made during the heat of encounter. This is just one of the examples of course.