Classic multibox leveling guide!

[Peregrine]

1c) LEVELING ROUTE
1-14
Start by accepting the inital quests and then leveling your toons to level 5. Once you hit level 5 I'd recommend going to the Orgrimmar start area and picking the quests there.
Once you complete all those, move to the Sen'Jin village and complete following quests:
https://classic.wowhead.com/quest=808/minshinas-skull
https://classic.wowhead.com/quest=826/zalazane
Also, nearby you can complete this quest:
https://classic.wowhead.com/quest=78...kar-aggression
From there, move to Razor Hill and pickup the following quests:
https://classic.wowhead.com/quest=806/dark-storms
https://classic.wowhead.com/quest=78...-the-betrayers
https://classic.wowhead.com/quest=837/encroachment
Complete the https://classic.wowhead.com/quest=837/encroachment and grind xp until you're lv 8 or so. In addition, you can complete the https://classic.wowhead.com/quest=78...-the-betrayers
and don't forget to pick up the chest all the way on top of the castle.
Once you complete all those quests, I'd recommend moving to the https://classic.wowhead.com/quest=828/margoz quest that you will receive from the npc
https://classic.wowhead.com/npc=3142...oulscar#starts
Once you're at Margoz, he will give you the follow up quest for the cave nearby. Farm there until you're level 10. Complete the quest that you've received, and from there move to Zepplein to Undercity and
visit Sepuluchur at Silverpine Forest. Pick up the following quests there:
https://classic.wowhead.com/quest=421/prove-your-worth
https://classic.wowhead.com/quest=48...ans-intentions
https://classic.wowhead.com/quest=44...talkers-report
https://classic.wowhead.com/quest=63...-the-undercity
If you have help, you can try the elite quest : https://classic.wowhead.com/quest=452/pyrewood-ambush
I'd recommend after doing all the quests to simply grind here until you're level 12 or so. Move to Undercity, pick up the quest for Rfc from :
https://classic.wowhead.com/quest=57...wer-to-destroy
Once you complete all those quests, you can simply backtrack to Orgrimmar (don't forget to set your HS here) turn in the quest from cave, take the follow up, complete the quests at cave and move to Crossroads.
I'd recommend taking following quests:
https://classic.wowhead.com/quest=14...aster-dizzywig
https://classic.wowhead.com/quest=87...pt-the-attacks
https://classic.wowhead.com/quest=50...the-crossroads
https://classic.wowhead.com/quest=87...stagnant-oasis
Once you complete those, move to Ratchet and pickup the following quests:
https://classic.wowhead.com/quest=900/samophlange
https://classic.wowhead.com/quest=88...ea-freebooters
https://classic.wowhead.com/quest=888/stolen-booty
https://classic.wowhead.com/quest=89...aron-longshore
Additionally, complete the following quests:
https://classic.wowhead.com/quest=850/kolkar-leaders

At this point, you should be lv 14 or close to it.
14-30

I'd recommend moving to Orgrimmar, waiting for buff (hp one) and then grinding the Rfc until you're level 19.

From there, you you should move to the Wailing Caverns and farm the inner circle of raptors (don't deviate from the dungeon ) and you should be able to hit lv 22. Once you're level 22, move to the
Tarren Mill and do the following quests:
https://classic.wowhead.com/quest=52...e-of-hillsbrad
https://classic.wowhead.com/quest=567/dangerous
https://classic.wowhead.com/quest=498/the-rescue
Once you complete those and are close to lv 24, move to Orgrimmar, and start travelling to Ashenvale, all the way to the Blackfanthom Deeps.
You can complete the following quests:
https://classic.wowhead.com/quest=65...g-scout-update
https://classic.wowhead.com/quest=64...e-zoram-strand
https://classic.wowhead.com/quest=21...d-a-thistlefur
https://classic.wowhead.com/quest=65...ale-outrunners

All those should net you level 24 at which you can move to Bfd dungeon and grind it until you're level 28.
Once you hit level 28th I would also really recommend grinding to level 30 anywhere in world you can. (preferably you can choose the thousand needles).