Garwulf at Huntsman’s Lodge: I’ve avoided Trap Launcher macros throughout Cataclysm mainly due to their inflexible and clunky nature. Most of the macros I’ve tried have suffered from one fatal flaw or another, and in the end, just wind up not being worth it. As such, I’ve gotten used to the act of manually using the ability for all of my traps.
However, recently I started working with a couple of macros that utilize Trap Launcher + Freezing Trap, and both are working famously for me, so I figured I’d share. 
First off, know that all Trap Launcher macros require two button presses no matter what. Trap Launcher initiates a Global Cooldown so there’s no way to macro it with a trap – using only one button press….Read Full Article.
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Perfect timing on this article. I’ve been dipping into RBG’s myself and found that my trap macros weren’t fast enough. What I was rolling with was:
#showtooltip ## Trap
/castsequence reset=3 Trap launcer, !## Trap
These were keybound to modified mousewheel up and downs, but if I clicked, say, shift+MW down for a Freezing Trap but instead wanted an Ice, I had to have a /cancelaura Trap Launcher macro to reset the sequence. I also had to be careful not to spam the macros, since the ! before the trap wasn’t registering for some reason. Basically, my macro was crap.
Garwulf’s trap macros can be switched between. Say you spam Ice, but wanted Freezing, you can right click and drag slightly to cancel the targeting reticule, and spam the other trap. There’s no hangup requiring a /cancelaura either.