Your mileage will vary, depending on your tolerance and patience. I am impatient, so I always want the EPs. I also stay onsite, because, for us, it is the least stressful...you can head to your room for a rest, or the pool, and still be able to ride what you want, without much of a wait.
If you don't mind lines, and many don't, not having EPs may be the way to go.
But, let's say you want EPs...your best bet, many times, is to stay onsite, at one of the three hotels that provide them with a stay (HRH, RPR and PB)...let's look:
It sounded like you were going for two days and splitting your days (Tuesday and a Thursday), but I suggest keeping them together and staying onsite:
Let's say, you want to be in the park on Tuesday, May 30 and the next day: You only need to book one night.
1 night at CB is $159
1 night at RPR is $294
If you stay at CB and decide you need EPs, they will cost you $255/day ($85 x 3) for the limited version or $300/day ($100 x 3) for the unlimited version.
So, CB stay plus EPs equal at least $414 for one day with EPs...and if you want EPs for the next day, it will be at least another $255.
1 night at RPR is $294 and unlimited EPs are included for both days.
None of the above includes cost of tickets...those will cost the same either way. Taxes also not included.