I'm using ISBoxer.
I recently begun multiboxing with my 3 shamans. Thus far, I've been doing strictly PvE.

Today, I gave BG a go (at lvl 23), however the experience I had was rather poor, and I wish helpful people here could help me out on this one.
My main problem seem to be movement. I know ISBoxer is capable of broadcasting mouse movement but I find it a bit clumsy and hard to use.
I'd love to learn use it properly, though. For now, I just use it for simple tasks such as trade windows, talents and occasionally entering/leaving BG/dungeon depending on my macros.

I don't know yet (I admit, haven't had much time to study multiboxing, I'm still learning more accurate and easier ways to keep up my setup) how else to hit the target on all clients I want without following.
So yes, on BGs I use follow macros constantly and when my main dies I basically start to struggle and get a bit confused.

I box 3 elemental shamans. Basically my binds are like so:

I hit 1 on current window (main) it broadcasts 1 on other clients and on current window it's just purely a Lightning Bolt, on other clients it's /target <main> /assist + /cast macro. I can't get on atm so I'm not able to copy paste them precisely, I'll gladly do if it's needed.
On G7 (I've got G11 keyboard) I got 3 functions, 3 totems. On main it casts searing totem, 2nd client is earthbind totem and 3rd client is healstream totem.

Let 's have an example:
I see lonely mage ahead, I rush in with my toons behind me, drop down totem set, LB, LB, Flame Shock, LB, LB, Earth Shock or Frost Shock, depending does target attempt to run away.
Usually, this or slightly longer rotation with same principle takes care of it. If however mage had a healer with him, it gets a bit more complicated.

As I said, if my main were to die, I get slightly confused and basically I am a very easy target to the opponent. I always go back with my leftover toons to wait for my main to get back, probably worst idea ever but I honestly lack a clue here.
I use action bar paging on 1-9 + 0,=, and - action bar , so if my main dies and I switch with ISBoxer to 2nd or 3rd client, it will broadcast a key combination of shift+2 = changing action bar page from 1 to 2.
Page 1 has LBs, Flame shocks and such macros adjusted to target my main and assist him. Page 2 again has same spells but for personal usage only, not for assisting.

In frustration I respec'd to resto x3. Tried out healing, and it turned out pretty messy as well. On slaves using same idea of assisting, just this time with [help], 1-2 were healing spells 3-6 damaging spells.
I really would love to PvP, but the thing is my setup (not hardware or toons, but gameplay) seems to be quite messed up or I'm executing something wrongly here.

Obviously tried search first, but with my keywords I couldn't come across any "pvp guide for ele noobs" or not really close enough my case either.

I wish you guys could help me out, even links to better guides and whatnot would be appreciated, cheers.