Hi Brad.
It is good to have a univeral config that works with all mods. The CTF hook does the best to accomplish that. I completely agree with you, you should not have to change your cfg and binds when playing different mods. Stick to the CTF config, that is my best advice, I use it as well.
To answer your question, Shmack allows the usage of "+hook." Most have that binded to mouse2.
CTF hook is harder to use, it is worth it into the end. Due to how other mods are configured, you will have to work harder while playing them - pressing more keys - etc., than others. That is until you get used to it, then it becomes 2nd nature to you and you can perform these actions easily, effortlessly and without giving it much thought.
Into conclusion you have 2 options. Change configs every time, use one for all and be consistent.
Going through axe is extremely beneficial, you cycle through a weapon. Think if a foe comes up to your face and you are busy selecting hook - into that split second you can deal them some damage with the axe first before going to hook to evade - then switch to any other weapon to inflict further damage - from the distance. I killed many this way. I think this is the norm, very good as it is extremely flexible - opening up lots of options, and it must not be changed.
Into the end it is up to you how you play the game, I was just giving some helpful suggestions.
P.S. I think the impulse 22, does work. I heard about it and I tested it onto the server and it goes straight to hook - this was a while ago. Bind it to a key.