My favorite unconventional build is a tanky Leblanc via roa, athene's and rylai's, eventually maxing out cdr with morello's or even frozen heart if the adc from enemy is starting to steamroll. People really underestimate the power of LB's cc's on a short cooldown. You be chaining/silencing left and right, and still tossing in decent damage here and there. People talk so much about maxing AP on LB and it's just dumb. Yeah, she hits hard as hell, but she gets caught, too. She's potentially the biggest cannon, but there's also no one as "glass" as she is. Give her a good amount of defense, and she's more than just a "hit hard and back off" champ. She's a hit "pretty hard" and do a lot more, too, champ. Honestly, she kills squishies just fine without hardly ANY ap at all. And a tanky LeBlanc makes a lot of enemies to really dumb things.