Spell sense is available only to casters for starters and next it's only for VERY high level players.
Next, it only shows spells that you KNOW otherwise it just gives you a vaugue aura. So unless your teammate happens to be casting a spell that you yourself know, you don't know what they are casting making it in a party situation (unless you happen to be grouping with people of the same guild and are a full caster) totally useless.
Otherwise everybody will have to add aliases in their clients that they'll have to turn on and off saying "healing".
In a nutshell though, if your party has any semis or mundanes of any level, and any casters who aren't over 50m, they aren't going to be able to tell that you're casting a spell.
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If you say plz because it is shorter than please, then I will say no because it is shorter then yes.
