This macro will cast natures swiftness if your in combat, and if you’re out of combat it won’t waste natures swiftness till you begin the next chain lightning. There is also a macro to use your trinkets and then start the instant casting lightning spell.
This will instantly cast Chain Lightning on your target if it is hostile.
/cast [combat,harm] Nature's Swiftness /stopcasting /cast [harm] Chain Lightning
The [combat] modifier allows you to avoid “wasting” Nature’s Swiftness when out of combat.
This macro will function similarly to the above one, except that it will also activate your trinkets and use Elemental Mastery. You’ll need to be targeting someone/something that you can cast Chain Lightning on for this macro to work. Substitute Lightning Bolt for Chain Lightning if you would rather the macro cast Lightning Bolt.
/stopmacro [nocombat,noharm] /use 13 /stopcasting /use 14 /stopcasting /cast Elemental Mastery /stopcasting /cast Nature's Swiftness /stopcasting /cast Chain Lightning
For the second macro to work you’ll need to be an elemental shaman with no wraith of air totem. You’re casters may hate you for it, but you’ll be able to use this awesome macro.