Create Transitions, Risers and SFX. It's common to see specialist plugins that simplify general synthesis architecture to focus on a particular task. With some thought and by linking key controls on plugins to automation clips, or a Patcher Control Surface you can do something similar with the tools you already have.
(Create an Image-Line Account first, if you don't already have one, to get access to the files)
MiniSynth was included free with the FL Studio 11.1 update.