If you are using EZKeys VSTi or Standalone just fill a new track with chords,
set your key in EZKeys,
holding the Ctrl drag that track name into EZKeys,
with the scissors cut any section to add EZKey phrases or remove if not playing,
select Use Browser Midi,
choose your phrase,
Replace,
As a VSTi you can play/loop RapidComposer while selecting the EZKeys phrase.

