Timing for Dr. Doom's blue skill

[technomagez]

Dr. Doom's blue skill says you can once per turn discard a heroic card to gain 2 power. Could you spend power for Doom's orange power since it is "before attacking with lightning", then discard a heroic trait to gain to power to buy extra dice during the attack?

 

[Jorch72]

Since it only works before attacking, first discard the card, gain power and then use the power to buy dice or use the orange power.