Originally Posted by Myrdin

Never got that special 500 coin boss. Hopefully at least one of those drops sooner than later.

Now a theoretical question: Is it more worth to nuke the boss with 3 boss charges, or is it better to go 3x times 1 charge ? What yields more coins ?

If the attacks are on the very same boss it doesn't matter when it comes to the coins. Powerwise it would be better to use 3 RP's at once.
But since you get the same amount of coins regardless of how much damage you do (1 damage or 1 billion damage doesn't matter), 1 RP is usually the best choise so you can get in an attack on multiple RB's.