for your information, I just did an experiment, I bought the 25 gem boost, and kept on battling leprechauns for 2 hours:
- used all 3 delivery slots for 2 hours every 6 minutes
- number of defeated leprechauns : 84
- number of 40 energy alicorns used : 24
- net gained Real Master points : +6989
(I realized I also used some additional energy daily droppers, but I don't remember how many)