In-Game Parser.

[Dwill]

I know pleanty of players who beat the DPS checks on things without parsers. want to know how? simply going in and learning what happens when.
your agrument is invalid.

Anecdotal evidences are worthless. Your argument is invalid.

Fun game, isn't it ?

It's possible to beat content without a parser, but it's putting self-imposed limits on yourself (and others) that don't need to be there. You don't need a speedometer in your car to know you're going too fast, or too slow on the freeway. Enjoy that speeding ticket though, when you thought you were doing okay, but didn't have an exact readout on your speed.

The same exact logic applies to end-game content. You don't need the meter there to have a general idea of if you're doing good or not. But having a parse on hand, while you're fighting, helps you make the necessary adjustments (using poison pots, or saving them if your raid DPS isn't on track) to actually beat a boss, instead of wipe to it. Do you get the point?

Except some people will never improve because they see big numbers on a chain combo and literally only use that one chain with their buffs having terrible uptime but they still think they do good because big number once every so often.