I'm not sure I understand the question. At the very least you need a key broadcaster, which you have with Autohotkey. And Jamba is very useful, so you're covered there.

But "efficient" is pretty subjective. Some people are a fan of using no addons. To them, not having to worry about patches breaking addons or having to mess around with layouts is efficient. Others like to use lots of addons to customize and filter information that they want to keep track of. And in plenty of cases, efficiency comes from macros, keybindings or how you have your boxing software set up. Even what software you use can be a big factor in your efficiency. ISBoxer, for example, has a lot of tools like VideoFX that can be very useful.

I guess the key to efficiency is being able to identify where you can do things "better" and then making adjustments. That's the sort of thing that is ongoing. I've been doing this for a couple of years now and I'm still coming up with new ways to do things or learning new ways from other people. And if I were to move into another area of multiboxing, like PVP or raiding, I'd have tons of new things to figure out.

As far as Autohotkey itself, I've never used it and I see that you just picked up a script somewhere. I want to warn you to be careful. You need to make sure that the scripts you use do not do anything that is automated. When I was researching moving from Keyclone to a scripted broadcaster I ran across a lot of botting scripts. I finally decided on HotKeyNet and the first thing I did was learn enough to write my own script from scratch to make sure I knew exactly what everything was doing.