I'm mad about my roommate's Aprils Fools Day prank where she spread rotten eggs all over my bed
Oh wow, that's nuts. What made you so mad about that prank?
I had heard about the plan earlier in the day, but I didn't think they could actually do it
Even if it's done in jest, ruining someone's belongings is completely unacceptable, and you are right to be angry.  However, you should tell your roommate that they were wrong, and ask them to make it up to you, rather than trying to get revenge by ruining their property.
They should pay, and suffer the consequences. I don't care what will happen, they should at least learn a lesson.
I understand your frustration and how horrible of a prank that was, but an eye for and eye makes the whole world blind. Don't you want to have a better relationship with your roommate? How about telling administration, or letting her see the error of her ways?