Is there any other moment other than the monk special ability / warhorse / psionic blast spell where you have to use the starting craft value instead of the actual craft value of your character? (every other time a card says something like "roll a dice and add your craft" or "if your craft is less than..." you always use your actual craft)?

That's an otious question, however, I can recollect Brainwave and Chant of Wisdom Quest Reward having to do with your Craft value.

thanks for those example, it's good to have a list since when playing with people who get something like the psionic blast spell for the first time, they always assume instinctively that it applies to all the craft

Keep in mind that you can cast Brainwave first and then Psionic Blast for double your craft value!