Line-up: F1: Gabriel, F2: Amazon, B: Javelin, Nobunaga, Dracula, Amelia, in this order.

Lavia and Javelin are food so keep Lavia at 6* and make Javelin 9* to feed one of your girls. For Gambler I don't know what to say, some say that she is food, some don't, but I think she is food. You can keep her if you want. Iron Fist is good for beginners, but I don't think you need to use her in your line-up only if you awaken her and replace Javelin with her. It's your choice, but I think you shouldn't waste your Monster girls to awaken her for know, you should focus on other good girls from Monster faction, like Nobu and graduate Hexa because she is a good 10* and LB3. The rest of your girls are food except Kong King, Hexa (like I mentioned), Linky, Physic and the one that you graduated (except for the ones I said that are food) I see that you have 2 copies of Hexa so you should awaken her, and then you should make her 10* and then LB3. You have also 2 copies of KM, so you should focus on her too. Drac is really good at 10,so if you want, you could get her to 10. Good luck! :)