How do YOU spend your RAF level grants?

[tldr]

I've never had much luck with "boosting", as the level gap has always meant the toon being boosted doesn't get much experience. Unless there's a method of "boosting" where the booster isn't doing most or all of the damage (e.g. I can see using my level 80 pally to run heals for a new 4 DK team).

I ended up spending RAF level grants on one rogue to get it from 40 to 79 on a druid to get it from ~43 to 80 (the remaining went to a 40+ mage), and the last bunch I'm planning on throwing at a DK that I started a little while ago.

I'm not sure what my next team to level up under RAF is going to be. Maybe DK because they start at 55 anyway. Do I try and level a fleshed out team (i.e. containing a tank, healer and DPS), so that I can do dungeons, or do I do another set of same-class toons like the rogues where even if I walk to the dungeons, being healer-less makes it far safer to do quests to level? The former will probably be a lot more interesting, but also a lot more complicated than anything I've done so far. Setting up a new team is fairly time-consuming as it is.

I had tried, when I was just getting started, to get in touch with the folks on magtheridon but never got any response from anyone. I play alliance now and have always preferred the alliance races and cities, but at some point I may start some horde toons on a different server to get some of those achievements. (eh, why not)

Also, I did manage to confirm a few things that I was uncertain about (or had heard but couldn't remember where)
1) The RAF process accumulates grantable levels UP TO 80 (every other level, that much is clear). The point is that you get 39 levels to grant, going from 1 to 80
2) You can't accumulate more than 39 levels (I think I'd heard 40, but had that been the case, my rogue would have been able to go from 40 to 80, rather than 40 to 79, since I should have otherwise accumulated more levels by leveling the 5 rogues from 1-40)
3) You can definitely grant levels all the way up to the level you're at (I haven't gone beyond 80 yet so I'm not sure if that's a hard limit regardless of grantor level). I was able to grant levels to a druid to get it to 80 (grantor was 80, grantee started at 43 or so)
4) Granting ~40 levels in front of the Stormwind bank causes quite a stir. I think in future I'll find somewhere with considerably less foot traffic to do it.