Wow, how about you try to actually read the FAQ this time. lol



Seriously tho - If you want to use your high level to boost the other 2 then you DONT want to link it with either of the lowbies. If you do it will nerf your xp when you boost since the linked toons must be within 4 levels of each other to get the trip xp bonus.

Also yes the RAF bonus does apply on trial accounts but you wont be able to level a trial account past lvl 20. Also while in trial you cannot trade with another player or the AH, plus you are limited to a max of 10g. So not a lot of incentive to remain in trial for too long.