Hi,
I read the other day on reddit that repulsor blast does not do all of it's damage at the same time due to the rule of activating abilities:
"When an ability has more than one sentence of text, the ability is resolved one sentence at a time."
This would mean that Repulsor Blast first does 1 damage and you discard the cards and then if you discard any energy resource, you deal the rest of the damage, so you could use this card to remove the "Tought" card with the first point of damage and then deal the rest of damage normally.
¿Is it like that?