It's not usually the program that will get you banned, it's the way the program is used
Exactly.

I have been using AHK since TBC. No problem so far. Rewrote the scripts for 6 boxing now, and doing fine.

AHK is a open source, generic scripting software, and it provides windows API/COM calling. Is good if you want to use the functions of Explorer, google search, Microsoft Office, etc directly from your scripts. Very handy. However, it provides no built-in function for PC communications, so have to rely on winsocks API to comm. This implies more coding works, tho you need no such function now. I stick to AHK solely becos I enjoy coding my own program.

I believe HKN is designed for game boxing, so will be a good choice for you. Also, Khat is always around to explain the scripts usage.