ME3 Multiplayer

I don't have a particularly high opinion of the game's plotline, but I very much enjoy the Multiplayer, and was wondering who else played. Though I haven't been able to play for a while due to problems with my computer, so I'm more than a bit behind in terms of unlocked weapons, characters, and the like. Plus, I'm currently somewhat more focused on other games, and only play a bit on the weekends, for the Challeneges (and the current one, to get 3 Killstreaks, is annoying in my opinion).

So, what's your thoughts or suggestions on the new (well, for me, at least) classes, starting with the N7 ones? So far I unlocked the Turian Havoc and the N7 Paladin, and I don't like either, particularly.