No, that won't solve the issue - so long as the average damage is a formula with x on the bottom (which it will be, because it's an average), the problem will persist. A Zen with 5 | 5 won't have an average damage of more than 6.
A permanent solution would be to remove the x in the denominator, by putting an x
2 in the numerator. An easier but temporary solution would be to have the charges increase by 2 each turn.
I would say lower Zen to 2 or 3 ATK, increase the cost of the ability to maybe 3 or 4
, and have the charges increase by 2 each turn.