This is my cooldown manager, coolline and shows Thorns coming off of cooldown. It can be moved anywhere and the look of it customized but I like it to flash a retard warning in the middle of my screen to use a spell.
I got Innervate2 to help manage throwing it around at the best times. I can just type in a name for who I want to be the target and set the threshold for at what % mana I want a warning. This means I can use my Innervate early and have it available again later but never waste it. This is a border screenflash warning. (It also spams chat every 10 seconds if the cd is available and needed.)
By far the favorite of my new addons is OPie. This allows me to assign spells to a pie, assign the pie to a hotkey and it will cast based on mouse position with hotkey release. You can also make it cast on click.
These are the two pies I have for combat. I've also made some for a bunch of other stuff I just don't want cluttering up my screen but want available at the press of a button like shapeshifting and some basic heals.