After countless hours of reading/creating Verin speculation, it clicked. Verin became accepted 70 years ago. (she seems older but the AS who was a novice with Verin (forget her name) is still fairly young. During her accepted test, she is forced to make a decision between helping (older) Rand or leaving the ter'angreal. She chooses to leave. This is her mistake. She spends the next 70 years searching for Rand and info on the ter'angreal T'A'R and portal stones. since her search for Rand started 50 years before anyone else's, she wasn't purged by BA. Verin's plan is to simply not make the same mistake twice. My final verdict (prior to PoD).