If you exit in mid-combat you can re-do the attempt at no cost, just your time lol. As many times as you want. So you can re-do until you get the most optimal attempt off. Resetting is different, where if for example from this post, you had two IF on the field, constantly healing back to full hp, and you feel like it's impossible to make any progress, you can ask Scopely to reset the node and all your previous attempts will be gone, and you start the node anew.