It is posible to dodge any of the atacks of the bosses of kallin? I feel that even with the rogue dodge skill I cant dodge a single atack
This is intended. The bosses should have required full plate armor with parry rate and so on. It makes me a little sad that some groups managed to kite bosses. But that's ok for the moment. 
b1-b2 area damage to high.if you are not a warrior, you usually die
The AoE from bosses are intended the way they are. There are gameplay mechanics to lower the received damage though.