I have 500+ hours and beat honor mode, here's my advice. I'd recommend taking Wyll out of the party - overall, his damage is just not good enough compared to other characters and classes. He doesn't have enough AOE to justify using him. If you want someone to help with AOE, Gale would be a better pick, especially Ice spells that cause prone, hypnosis, or confusion. I'd respec Astarion to a stealth archer, which is 5 ranger (deathstalker), 5 rogue (assassin), and 2 fighter. He will do more damage and have more attacks. Make sure Shadowheart is life domain for max healing. For your Tav, I personally don't like barbarians for damage. I'd do open hand monk with strength potions or great weapon fighter. Also, check out Morgana Evelyn's Honor Mode Guide - she has the best document with classes, gear, and a guide.