There is definite unbalance among several card within Elements, I'm no statistician but instead of nit picking ever powerful and weak card in the game. Maybe changes on a Global scale is what Elements needs.
The Card pool is ever increasing. Maybe we should look at lowering the maximum number of copies from 6 to 5. and or upping the minimum deck size to 35 cards or higher??
With this example you now have only 5 supernova's in a 35 card deck (14.2% of the deck ). instead of 6 in a 30 (20% of the deck ). or 5 in a 30 (16.6% of the deck).
Lets not nerf all the great cards but maybe a smaller frequency of drawing them would be more beneficial.
This is just what I think sorry if someone posted something similar. SG make the forums so HUGE!!