Where are you up to with most content? Specifically Clan Boss, Dragon, Spider and Fire Knight. It'd be good to know where you are up to with Arena too, though I know that you mentioned not being concerned. I do think it's worthwhile building a team to get consistent wins in Arena as you will want to steady income of gold medals to start managing the Great Hall.
The first thing that jumps out at me is the amount of 60's you have, but how low the gear is on your UDK. I suspect he isn't wearing some boots with speed as their primary stat, and this is mandatory for all of your champions at this stage of the game. This will be one of the major hurdles with taking on content, largely because your champions will be too slow to cycle back around to their skills, or even take turns before the enemy.
You also have a lot of epic champions to 50, and a lot of rares to 40. You will want to stop spreading yourself thin by taking up a lot of champions, and instead focus on specific ones that will do their job.
I can already see some options for solid teams in there, such as:
Spider team:
- Walking Tomb Dreng - AoE HP burn that is unresistable
- Achak - AoE freeze for spiderlings
- UDK - Tanking the spiderlings damage, and healing. Also brings decrease attack
- Armiger - You don't have him yet, but he is an uncommon champion (green) of the Sacred Order, so will appear quite often in shards and the market place. Get him, level him and use duplicates of him to book him out. He will bring in good turn meter control to the team
- Fu Shan for speed lead, or Husk for Max HP damage
All of this really relies on good gear though, so if gearing is your biggest challenge then it is actually Dragon that you need to be focusing your time on.
Also, if you get a Frozen Banshee (rare) then keep her too, as she will be useful for both CB and Dragon.