i like the idea, however there are writ rk's who trait all the writ traits, it's possible they could have all 3 up at once, so you'd have to make a universal looking one so they don't clash, however all the traits do different things, some cast without cooldown others are free to cast and others are instant cast etc etc. if you're single line traited just count to 5, i could see it being trickier with all 3 up though. cause then any writ affects the others which gives you a free writ here etc, problem there is you'd need to balance them to be 3,4,5 and make them all go off one after the other. On their individual tiers an aura wouldn't help with that, since it'd have to be distinguishable from the other 2 to be of aid.
You will find that conversational range increases dramatically when you talk about what you think, rather than what you know.