I like the idea for general advice, maybe hint at the necessity to cc provoke or the importance of swift cast but please no actually boss or raid advice just tips like

"Don't forget you defensive cool-downs, a properly timed cool-down could mean the difference between life and death"
or
"Accumulated Damage over time (DOT) abilities can provide a significant amount of damage"

Things that players new to FF14 or even MMO's in general might not realize at first until someone gets rude about it in DF.