Which classes should i pick next?

I've got a w/m and a r/me, whats another combo that works well?

Mo/N to unlock two more character class skills. Plus with a monk you can get into groups a lot easier.

Do whatever you want. There's no class that "works well", because it's about builds. Personally, I just made a monk character (heading through the Shiverpeaks at the moment) and I really like playing a monk (a few mesmer skills on the side for fun :P)

E/Mo is kinda popular, but I like monk primary better (ele bores me)

Well, if you want to have a third character to unlock skills for your fourth (PvP) character, you'll want to make an N/E or an E/N.

Personally, I think that necros are a blast to play, and I've gotten bored playing ele. Nothing against eles, necros are just alot more fun to me.

Of course, if you're not worried about your PvP slot, you've got more flexibility. In which case, make a necro. The necro forum should give you lots of ideas for secondaries, though you can't go wrong with monk.

Definately agree with doing necro-ele combination. But I recommend trying a monk primary. That was the first character I made and because most teams want 2 monks later in the game you can progress very quickly. Healing/Protectingare also very useful skills to master incase someone in your guild needs help. Its up to you what you do though.

I agree the perks of being a monk are all laid out there. You get picked up in groups easily, can solo a lot of areas, but playing as an actual monk can be stressful and not so fun. I'm making one simply for factions.