The recipient of the Scroll, needs to be an account that was active previously but has been inactive since before the Scroll Promotion.

Honestly, Recruit a Friend is a much better deal.
I'd rather have 300% experience, for 3 months than one toon at 80th level on only one of the two accounts once.

Since you're starting fresh...
I would take one character (a strong booster, like a Druid, Paladin, Death Knight) and quest them to at least 85th.
That teaches you the game again; the Dungeon Finder tool is great for leveling especially as a tank character.

Take your one booster (at 85 or higher)...
And server transfer to a server with a lot of other boxers:
- US Horde, The Zerg on Magtheridon
- US Alliance, Legion of Boom on Kil'jaeden
- EU Horde, GIMP on Grim'Batol
- EU Ally, Autobots Rolls Out on Outland

When you transfer, have resources like gold and bags on the character.
Heirlooms too, if you have any.

Do a pair of RAF chains:
A > B > C
A > D > E

Use 'A' (the existing account, with the booster) to boost/level characters on BCDE.
With granted levels, you basically end up with as many toons on A as you boost.
Four toons boosted on BCDE, gets you: 6x on ABD and 4x on CE.