Forgive the long post sorry in advance. I am a former end game raider who wowquit for 3 months. I have found a new interest in wow and that is multiboxing and I am loving it so much. I look forward to learning more and reading more from your helpfulselves.

I am currently boxing a 4 x Shaman team from scratch and just got to lvl 13 via questing. I spread professions out on all 4 shamans, none have the same.
How important would it be to lvl their professions as I go or simply boost the professions at a later date? Eg how important is it to supply my own gear for the clones? They are 13 but still running in mostly starting gear and level relevant LW stuff made by one of the clones.

My main account (with the 4 x 70's) I cannot make another complimentary clone to 5 box as I got no toon space left on that account LOL. UNFORTUNATLY on clone 1 account I have my 70 Paladin and 70 Mage, they are my most proficient instance boost toons due to the speed of the mage and pally tank. The pally aoe reflective dmg is great to boost with added with the ability to resurrect the alts if needed as well. So it really only comes down to the shaman boosting the 4 clones but it seems so much slower then using the paladin.
Can a 4 x Shaman team farm instances for gear/XP or better to try and use one of the 70's to farm gear and distriubte via master loot?

I really am enjoying the BASICS so far of multiboxing and have made a 4 set of each of the range classes, only levled the shamans so far lol.
What would be the best way to "template" Ui's, macros etc for when I setout to box the other classes?

I know that 5 x shaman teams can take out instances just wondering if a 4 x shaman team could do it as well?
I have heard of "totem kiting" groups of elites in instances can someone explain this further?

Currently with my 4 x shaman team I can zerg mobs down no problems at all. I have the default focus macro for dps spells on all the accounts (brain + clones) and this works well until my target is dead and I alt tab to another mob. When I do this the brain as well as the clones still are trying to targeting the dead mob whilst I am getting beat on by the other enemy.
Do I have to create a clear focus macro if I am tab targeting a different mob after one dies?

Healing: I have a key bound to "heal self" on all toons and alt+ "heal self" to target and heal the brain. I was thinking of perhaps F1-F4 bound so that all heals goes to one target. and F5-F8 as an individual heal self whilst the other 3 dont get a key passed at all.
Would the above be the best way to manage healing duties?

Addons: I have only my Ui addons I am using atm: questhelper, bulkmail, bongos, ATSW, AG UF, Fubar.
Are there "must" have or really handy addons one would advise on getting?

With the amount of shaman teams kicking around I was hoping there might be a sticky or a guide one could point me to read up on?