I have been trying to coordinate the timing of the Storm Rider ability with Experience Points upgrade intervals using Time Warp cards. Misreading the cooldown numerals have messed me up a couple times. That tiny dark red font is really hard to read (5 looks like a 3, for example).

Better yet, fix the Storm Rider mouse-over popup "Cooldown:" item, since it should display the actual time remaining before the buff can be reactivated.

Edit (1/28/16) - Having accumulated some idols and experience playing the game, realized that trying to finesse the timing to get an edge is more trouble than its worth... if i hit 'the wall' before achieving an objective, it's better to just reset, cash out my idols for that run, and retry :P