What Wubsie said, plus a Set Camera View keybind (for my melee teams, zoom in all the way and look at the ground).

I've had much more success with the two step mapped key rather than putting it all in one step. It does have two drawbacks that I've encountered though:

1. If you try and spam the key, your alts can stop following even though it's a left click. Maybe this is erroneous and unrelated to the key itself, but it's what I experienced.

2. If you press the key more than once, you're likely to change your target repeatedly. This can be an issue if you need strict assisting and/or if you have 'reset=target' conditionals in your macros.

As an aside, it is possible to create Set Camera Views such that your alts will be targeting pretty close to where your main is. It takes a lot of trial and error and it won't work if your team is scattered to hell and back, but it's close enough for most things.