Advice for next 6* and plan moving forward

http://imgur.com/a/98E2q

Hey guys, I've linked my box above. Currently in terms of progression I am able to do everything up to TOA 79, being stuck at TOA 80 (the aoe damage is just too much even if I take Chloe). I can also do GB10 in 4:40 minute average with 95% success rate with the team of Vero, Bella, Bernard, Shannon and Chasun. My mons outside of these 5 and Verde are pretty poorly runed, which I'm working on improving through runs. My current farmer is my Vero who can do Faimon Hard 100% and Hell if he has a five star or six star being leveled beside him.

Anyway I'm on a xp booster right now for the chocolate event and will be able to 6* a monster in a couple hours, and am wondering who it should be. I'd prefer not to 6* Shannon as she is doing her job, and almost never dies in Giants. I can also 5* a few people, but those will be dependent on your answer to my next question. What should my first dragon's team look like? I was thinking that Verde, Vero, Bella, Chilling, Megan should work straight boss, but I'm not sure if that is too ambitious. Final question is what I should do with my future Devilmon since Vero is maxed. Currently my Chasun is also full skill 3, and 2 each into skills 1 and 2 from before I got Vero.

Thank you to everyone that gives me a response, I hope when I'm a bit more experienced that I will be able to give back to this community!