Best way to progress/ Who to 6* next

Sorry for adding to the large amounts of similar posts but just wondering if I could get any input on what to start focusing on. Here is what I can do currently:

-I can Auto Giants B8 and Dragons B7 with the monsters I'm currently using, but I see no way of getting past giants B8 with my monsters seeing as my Hwa carries me through the entire dungeon and she just takes too much damage from the counterattacks if its not elementally resisted.

-For ToA I can only reach up to floor 50 on normal because I lack the damage or cc to just outright kill the boss.

-I use Soha as a faimon (hard) farmer but she could use a little bit more consistency.

[Here](http://imgur.com/8SLG4Uv) are my monsters. If I could get any suggestions on who to 6* first (I have some fodders saved up already for ahman before I fused baretta and changed my mind) that'd be great, or if I should start trying to fuse Sigmarus because I lack aoe damage, Katarina because of the Chloe synergy, or Ifrit because his passive is so good. I have amazing Rage runes saved up but sadly no-one to use them on.

Also I'm having a difficult time thinking about where I should fit Darion in if at all. My most consistent dungeon team at the moment is:

Ahman (Lead), Shannon, Bernard, Bella, and Hwa

Thanks so much for the help!