by DrRickso » Thu Jan 30, 2014 1:43 pm
as far as card specifics, load up on hp cards... you'll be able to withstand level 34ish on your own just with a couple of hp type cards and a leader that gives a 2x or 2.5x to hp. you can try half damage cards as well, but even then you'll need hp to survive the opposite color in rnd 2.
After a certain level- you aren't meant to beat it on your own and it requires multiple attempts or friends to attack it. unfortunately, there is little reward for raids outside of the boss cards which are extremely rare to drop so many people don't bother at all, or already earned boss cards and don't care.