29 Oct 2009 at 06:55 - 11
you guys can change your second profession later, so it doesn't really matter if you're ele/monk or ele/mes at the beginning.
elementalists got high damage output and nice offensive abilities at the beginning, but they suffer from highened mob armor in the hard mode. and they suffer a lot. as long as an ele might seem appealing for someone new to game, i generally wouldn't suggest it as a main character (good for farming in some places though).
you said you were thinking about a ritualist and this is the current way to go, to be honest. the spirit army is unstoppable and the rit has some decent healing abilities, as well as some nice prots. it's also a fun profession to play.
i would just suggest you to play whatever you like - in this case: rit - and complete first few quests/missions in factions alone, with henches. same for your friend with his paragon in nightfall. then, after getting to kaineng center, you can travel to nightfall and join your friend, to finish whole nightfall campaign (often suggested to complete first since it provides you heroes). later you can get back to factions and complete it together too, and later you can travel to tyria with your characters. it's all well connected.
and don't be afraid or concerned about that solo beginning - you'll get a chance to know your profession a bit, you'll learn the basics of how henchmen work (AI, calling, flagging etc) and the noob islands of both campaigns are pretty small, doable in a day or two by a new player.
plus, with a rit with his spirit army, which is easily managable, you'll see lots of nice floating numbers out there, including the ability to farm items for nicholas and farm/vq some areas completely solo.
consider also a necromancer, check his skills, plus he can run a decent /rt healer and /rt spirit spammer builds later as well.