dual boxing composition and various questions

[EaTCarbS]

1)How to overcome looting quests,which were a pain in the ass with all the alt-tabbing

You can set the "Interact with Target" key to make looting a breeze. As far as items on the ground you have to click, you'll just have to switch windows.

2)Which composition(s) to use.

Completely up to you

3)how to use clique/vuhdo while playing on another client.

http://isboxer.com/index.php/guides/...lique-repeater
You can set up something similar in HKN, but it is a pain. Much easier with ISboxer.

4)What's the best way to level and if I can pull my weight in dungeons(I was thinking about tanking/ranged dps+an healer,playing on the tank/dps client and using vuhdo to heal)

Questing and LFD are the ways to level. Boosting wouldn't be an option with only 2 accounts. The easiest to play would be 2dps or tank/dps. Playing the healer complicates things.

5)If I do tank+healer,if I put healer in follow am I going to die often in instances?

If you have the skill, you should be able to do it without problems. Plenty of us here have been 5 boxing instances for years, so it is definitely possible.

Keep in mind that I would like to level 2 or more toons.2 ranged (hunter,mage) and 1 melee(warr),I don't care about the other account since it will be dropped or given to a friend as soon as the 30 days expire.

I don't reccomend giving accounts to other people

Keyclone is $20 for a lifetime licence. ISboxer is $30 for 3 months (correct me if mistaken). HotKeyNet is free if you don't mind taking a bit to set it up.