Magelo Sync has already been updated to work with Rift 1.5 Hotfix #3. The patch was applied at 7:00am PDT 10/4/11 [NA] - 1:15am GMT 4/10/11 [EU]. You can check out the patch note below, also available in the Rift forum.
GENERAL
Call of the Ascended now correctly consumes 3 Planar Charges instead of all current charges.