Well, a few things. First, wait longer so you roll all through your acid comedown (3.5-4 hours in), and second, the acid potentiates the e, so you don't need as much. 200mg is way too much for a flip. Two hits of acid and 100-125mg of e would be much more balanced, and if you want to stick to one hit, try 80ish, though I'm not sure why you want to candyflip if you don't like tripping harder than that.
The chemicals have a definite synergy (the closed-eye visuals while holding onto someone and listening to music are insane, and the world is SO beautiful), but the acid can be overpowered, so make sure to get your doses right. And as for the timing, if you've been peaking on the acid for an hour or two, the rush from the e is amazing. Every weight in your mind and body lifts off you, trees seem to bloom spontaneously, if your trip was beginning to lull, it's now time to adventure even harder than before and every single thing and place you come across is perfect. With just acid, I appreciate the large things. With the combination, I appreciate the small things.
Wow, my heart's starting to pound reminiscing about it. >_> Good thing I'm doing it again this weekend.
Anyway, combinations aren't always easy to pull off, but I think this one's worth it. It's not as deep as acid alone, but it adds a lot more layers to the e, and, as I said, that initial rush is amazing.