Are you using follow strobe or just follow? You shouldn't use follow strobing in combat because it messes up facing.

There is no way to make your slaves "auto face" a target. You will need to either use something like focus lens macos, use interact with target followed by a backstep, or manually turn them...or make them all follow and reposition, which is probably the worst option.

Finally, you will want to create and use a set of keys that allow movement for the whole team. This is usually the arrow keys. This way, when you press arrow down, all of your toons move backwards.

I'd post links but I'm on my phone. Just do a search for "focus lens macro", "slave movement", "slave facing".

As far as difficulty, higher level mages have a lot better gear, more practice and more abilities to use. Running all dps as a pve multiboxing group is not exactly a "starter group". The people who have done it are probably on Their umpteenth team and using heirlooms. That's not to say give up or don't bother, but be aware that it's not the setup most people would advise you start with. You may find things a lot easier with a more standard group makeup until you have a better grasp of what you can do.