First I want to say thanks for the great resource that is provided here. I've been able to make a lot of progress with isboxer and dual boxing just from reading the forum post.

I Started dual boxing last week, RAF leveling two wow druids from scratch after re-starting wow. I haven't played wow in two or three years but got the itch and found out that RAF was the fastest way to level.
Last week a good friend of mine and wow player told me I could have his account. I also took advantage of the black Friday deal and picked up 3 copies of the $5 battle chest.

My new gifted account has an 89 Warlock and an 85 Paladin. This will be the account I use to boost the other accounts. Call this Account A.

On my MoP account, lets call this account B, which I started new last week, I have only a 40 druid and a bank character. I also have my RAF account(call account c) which also has a 40 druid.

The characters on A and B/C are not on the same server, and I'm okay with all my characters ending up on account A's server.

My plan is to use the A account Paladin to boost accounts B,C plus two of the $5 Battle chest accounts(D and E) to 80 to level grant back to A so that I end up with a Level 80 of each class on account A. If I really get into multiboxing I may decide to keep up the teams on accounts BCED, but initially my goal is simply to level grant back to A.

Here is where I run into questions.
1) How to structure the RAF chain in order to make this the most efficient.
I've read through a lot of post here and keep seeing Ualaa mention level cascading, I have no understanding of this concept at all. Do the levels all end up at A or what? I'm missing something here.

2) I've never played a Paladin before. I was leveling the druid(a class I have played before) to take the role of booster in the future but then my friend decided to gift me the pally, I'm not one to look a gift horse in the mouth, or gift Tauren, as it were, but I have no idea how to play this character as a booster. I intend to start at the low level instances and run through them before taking in the teams to boost, just as a learning experience.
What advice can you give me on Spec, Glyphs, gear requirements and especially rotation for boosting with an 85 paladin.

I'm sure I'll think of more questions but these two seem to be the big ones I need to get a grasp of before I actually can get started. Thanks in advance for any and all help you can give.