There is no one-size-fits-all answer to your question. It depends what your personal priorities are.
What rides do you want to do?
Are you going on a slower week? Easter?
Are you buying G+?
Are you in the park all day, or just part of the day?
How much walking do you want to do?
Did you get a BG for GoG?
Do you have any dining booked? What time do you want to eat?
If you have G+, then you should get passes for some rides, and use the passes in the order you are able to book them. Remy is probably a priority, Frozen is also a good choice if you are willing to walk to the back of the park in the morning/can't get a good Remy time. Test Track is another good option for your first G+ pass. (or ride of the day if you do not have G+.) They are only priorities though if those rides appeal to your group.
You can try heading to Remy first thing, but the line will already be there if you are not able to do early entry. Even with Early Entry, you might not be first.
Another strategy is to accept that you will wait for Remy, but use morning to cover as many shorter-wait attractions as possible. If you head right for Remy, you will, in essence be following the crowd.
Another valid strategy is to skip one or more rides, and ONLY do rides with shorter waits. Epcot has many things to do that are not rides.
Since many people have G+ though, they will head to other top attractions (listed above), so you won't really see short waits, just not as long as mid-day.
Easter and other holidays will see longer waits everywhere. Other weeks though, many Epcot attractions have reasonable waits most of the day. My Disney Experience on your phone will give you wait times, so you can use it to steer your choices.
One common pattern- avoid Living with the Land at lunch time. The Land gets busy mid-day, but then is not very busy much of the day.
If you know your priorities, use
MDE now to study/learn the patterns of Epcot (and all the parks). Which attractions do have long waits mid-day, and which ones do not. For 1 or 2 days, check MDE every 60 min or so to glean a rough idea of what to expect, and what you are interested in riding.