I would like to point out that even if you don't know your team very well (because it's a pickup team) and you don't have/don't like Teamspeak, some debuffs are really clear. When fighting Vorkoo, for instance, if I can't see the speed lines of the sword/axe of the tank, it's time for extra healing. :)
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Remembering Tyneetryk
Phaedreas Tears - 15 years old and first(*) of true neutral guilds in Atys.
(*) This statement is contested, but we are certainly the longest lasting.
<clowns | me & you | jokers>