When you wrote "folic acid", I was sceptical. No one should take folic acid. Too many people have difficulty metabolizing it, and while we end up with a high blood level (because it just keeps circulating), it doesn't do a blessed thing. Methylfolate, on the other hand, is a wonder supplement, so I was glad to find it is the form you're taking.
Still, 2 milligrams of methylfolate is a very high dose (although not even close to what's in Deplin). I was taking 800 *micrograms*/day, and all I did was sleep, so I cut it back to 400. I may increase over time, but I don't ever expect to go over 800.
I do not take any supplements as combinations, because I prefer the freedom of choosing my own doses. For example, I take 600 mg of NAC twice a day (sometimes 3x/day) and 2500 micrograms of B12* (the methyl form) every other day. (I used to take more B12, but my blood level went way over range, so it is clear I don't need megadoses.)
Nonetheless, I suspect you will see good results. All the constituents of Cerefolin NAC are known to improve memory problems, so the three together should be a slam dunk.
Here's a little more information about possible reactions to methylfolate and what to do about them:
http://mthfr.net/methylfolate-side-effects/2012/03/01/
You might also want to look into vinpocetine.
*Edit: I do not take 2500 micrograms of Vitamin B12. I used to take 5 mg of Vitamin B12, but when my blood level went over the 1000 mark, I cut back. A lot. I now take 500 micrograms every other day. Sheesh.