Help create a line up for me?

Hello,

I'm a team level 92 and I've made the mistake of trying to level too many heroes. I'm starting to spread too thin and as a result I don't have a very strong line up for Arena/Grand Arena as I could have fifteen Orange level heroes instead I have thirty plus Purple+4 level heroes.

My problem is I don't know which heroes I should focus on now, I've been creating some different line ups but was thinking perhaps this is the best place to get some advice on some really strong teams I could create.

What I hope to accomplish is listing all my current heroes. They are all at the same level. All Five star and level 90 Purple+4 at least 5/6 equipped with at least two star (Journeyman) enchants on each piece of gear. I'm looking for a very strong lineup for my three grand arena teams and arena team. Then as I focus on gearing these heroes up I hope to increase my rank to the top 200. Right now my rank in both ranges between 500-600.

Any help at all would be appreciated.

My Front Heroes:
 

• Tanks
   
• Dwarf Warrior
   
• Shallows Keeper
   
• Admiral
   
• Deathknight
   
• Crossed Knight
   
• Dungeon Keeper
   
• Non Tanks
   
• Cleric
   
• Vanguard Warrior
   
• Arcane Sapper
   
• Ember Blade
   
• Psychopath
   
• Fallen Dominion
   

My Central Heroes
 

• Emberstar
   
• Lightning Master
   
• Phoenix
   
• Old Curse
   
• Frost Mage
   
• Death Mage
   
• Ninja Assassin
   
• Disease Bringer
   
• Cloud Walker
   
• Succubus
   
• Scorpion Queen
   
• Desert Lycan
   
• Machinist
   
• Wandering Spearman
   

My Back Heroes
 

• Shadowleaf
   
• Chaplain
   
• Light Bringer
   
• Rifleman
   
• Commando
   
• Mystic
   
• Pilot
   
• Sniper
   
• Wind Master
   
• Enchantress
   
• Manipulator
   
• Queen of Curse
   

My current teams are setup as following. I feel there is room for improvement, which is why I'm writing this post.

My arena team:
  Commando, Manipulator, Machinist, Ninja Warrior, Admiral
  My Grand Arena Teams:
  Team 1 - Shallows Keeper, Fallen Dominion, Cloud Walker, Ninja Warrior, Commando
  Team 2 - Deathknight, Queen of Curse, Scorpion Queen, Deathmage, Succubus
  Team 3 - Dwarf Warrior, Phoenix, Frost Mage, Manipulator, Mystic
 

Thank you for any help.
  Edited to fix formatting to make it somewhat bearable to read. Also open to any suggestions to heroes I should prioritize and add to my mix.