The classical route visiting the central atolls of the Maldives, known as "Best of Maldives", "Central Atolls" or "Magic Maldives", but . . . even going a bit more South. This route gives you a very nice impression of what it is what Maldives has to offer. Almost all highlights can be seen during this trip.
The Ari Atoll has it all. Amazing thila's as well as great channels. In principle you can see pretty much most stuff Maldives has to offer: nice colourful reefs with plenty of fish, but also sharks and manta rays. With a bit of luck you might even spot a whale-shark as in the South there is a population that seems to be there all year round.
South Malé has some great divespots, especially the channels and thilas on the east are, with a bit of luck of the currents, overwhelming.
This trip is comfortably starting and ending from Velana Airport in Malé, so no additional domestic travel is needed.