[WoW] Looking for some opinions on second character

My aim (and what I'm doing currently) is to box up a warrior and priest combo. However, my warrior started after the priest and is still too far below them for them to group together for quests/grinding.

I do, however, have 2 other classes on my priests account around my warriors level. Having checked the sticky they are both viable options for dual-boxing.

What I'm looking for is just some advice on which route to take, possibly also if anyone has tips for a particular class combo.

Here are my options:
1. Continue healbotting on my priest until my warrior reaches her level.
Pro's - will hopefully be comfortable with the healing side by then that I can happily add in damage on my priest.
Con's - at the moment my priest gains nothing from this set-up

2. Group my warrior with a different character until he gets to my priests level (only 8 to go).
Pro's - will be able to level up one of my other alts with my warrior.
Con's - slower than babysitting method (but will work on an extra toon, so maybe more net gain).

Classes:
a) rogue - I'm unsure how easy it would be to get too melee toons working
b) warlock - can set up a load of castsequence macros and spam to my hearts content

Not sure if it matters, but my warrior is arms spec and I have no desire to go fury on him.

Any advice welcome.

If it were me, I'd do the first option to get my team together in levels as quickly as possible and move forward with them.

Of course you can do both for variety and experimentation. I wouldn't pair the warrior with a rogue though. Two melee characters are not easy to do and not worth the effort in my opinion. Plus I think the styles are too different between these two classes. I'd hate to be trying to concentrate on both rage generation and combo points at the same time.

The warrior and a warlock would be fine I think. While the warrior is charging in to engage a mob, the warlock can follow along behind dotting it up with his instants. His pet can help on the warrior target, offtank other mobs, take on adds, etc.

I played a warrior/priest/mage trinity combination for a long time and had fun with it leveling to 70. It could get hectic at times with three classes. The priest usually just healed. My current team is a shadow priest and 2 Warlocks. I've found this to be much easier to deal with and less stressful. A lot easier than the trinity for taking on multiple mobs and adds.

I would never take rogue not as first nor second character simply because you will have to move out of stealth all the time and usually (esp. in pvp) you are cannon meat without stealth. If you go stealth - rest of your team becomes very slow, thats crap.

The only time I've boxed with a Rogue was to help one level up with a 70 priest as an un-partied healbot. She was as "stealthy" as the Rogue most of the time because of her level, LOL. I would let her "passively" engage mobs from inside her bubble while I took them down one at a time with the Rogue.

It made for fast leveling on the Rogue as he never stopped to bandage, or eat, or ran away from fights. I got him up to 60 but abandoned that server to play with other friends elsewhere.

Thanks for the advice.

Based on that I went for warlock instead of rogue. For me playing the priest unpartied felt like a bit of a waste, I enjoy levelling alts, so would rather do something productive for both characters, rather than just one (and my warlock got her felsteed). Took a bit of time to set up my lock, but hopefully learnt some lessons I can take over when I play my priest with my warrior (as so far she's been quite alright just targetting him for heals, but damage needs you to target mobs).

Ended up with lower xp/hour for my warrior, but considering it was for two chars overall I think it was worth playing both at once. Brought up a bit of another problem that I'll have which is my priest is fully rested, whilst my warrior has no rested xp, so she'll probably still be a couple of levels higher than him when they quest together.

One thing I am going to miss when I go back to my priest is my seduce macro, found it really handy to have cc on tap (except when I tried to seduce, changed target and then sent my pet to attack without thinking - still some learning to do, hehe)