Simple to use Envoy script, use /envoy to get an envoy chest to place. Change the options at the top of the script to fit your needs. To start an envoy event, you can use the Skript function envoydrop().
Requirements: Skript and TuSKe.
envoy.sk
Umm.... no, no its not:
http://skriptlang.github.io/Skript/effects.html#EffSendTitle
Titles are built directly into Skript.
Skript has a lot to offer. I highly recommend checking Skript's docs for things before attempting to use addons for such.