Interface
In the Midnight Pre-Patch a lot of addons are unable to do as much as they could before. You will need to use more of the default UI, with some customisation options being offered by addons.
When the best addons to use become clearer, we will update this guide section!
Macros
One very useful type of macro for Elemental is @cursor macros.
These let you cast all the different ground targeted totems and spells without having to left click.
Earthquake Example:
#showtooltip Earthquake
/cast [@cursor] Earthquake