Congrats on Dragon 20! I would advise to stop spending gold bars on blue shards.  You seem to have ample heroes on your roster now.  Focus on gear, masteries, and books (clan boss).

@Trips.  Thanks.  

I agree with you.  I will get more heroes from random rewards.  I didnt realize the power of masteries and books.  I know I am weak on gear.  

Other than CB are there battles where masteries are a necessity?  

@Player J  ......  Once we get to the Dragon he doesnt even get a chance to use his fire breath.  We kill him fast.  Its the waves that take time.  Should I try some AoE damage dealers that are Force affinity to give me an edge?