Should I use the mod on Druids?It makes the Druid really cool but that seems like cheating.In fact,I think that made the druid superior to any other class.what do you think?

Personally i believe that in IWD2 the druid is the superior class.

As for MODing there is one official rule....never MOD if you have not baeten the game atleast once. After you have beaten the game normally then you can MOD for challenges and so on.