Questions on refer a friend bonuses and 5 man team composition

Hey I just finished building my systems and am getting my vetra box tomorrow! Anyway, i want to level up 3 sets of characters (boomkin, ele shaman, tri mage dps group, 5x shaman group, and resto shaman + 4 mages group) and i wanted to know if I get one set to 80 and then start another within the 90 days will i get triple exp up to 60 again? What about if i get all 3 up to 59 before i ding any of them 60. Also how hard is it going to be to do instances with these groups? Can i realistically tank using the druid and dps with the mages while healing with the shaman leveling up or is that just too complex for a beginner? Thanks for the help! I'm very excited to start :)

Heya :) to answer your question, as long as you are within your 90 day timeframe, you can level up as many characters as you want. they will all have the triple exp bonus. (lots of people here level up multiple teams)

and as for tanking with the druid, it's doable as long as you setup your macros correctly, which will take time to do. But really you can do just about anything with any characters as long as you can setup their macros properly. but in terms of for leveling, you really dont neeed a tank unless you're going to level through instances. with all quest mobs, you should be able to 1-2 shot them with your team, so a tank is not necessary.

good luck on your team :)