So i'm a LS newb...

Does melee attacks worth with +mana per hit?
How do you other guardians go about getting mana in combat?

Mana Syphon and MPK/MPA are pretty much the only way to gain mana back, besides using items like fish or comfreys. And yes, any kind of attack (melee or casting) works for MPA/LPA

I'd suggest checking out the character guides: http://forums.d2jsp.org/topic.php?t=22760522&f=74
Or, if you just want to skip to the guardian guide go here: http://forums.d2jsp.org/topic.php?t=20473486&f=272


And just to let you know, a guardian is most commonly played as a healer (personally I think that they're best as healers, but some people would probably argue that they are better hybrids. But that point is debatable just on the grounds that hybrids are more expensive than any others by nature so obviously they're going to be better... but I'm not going to get into that )

Feel free to PM me or anyone else on this list if you have any specific questions

Ok cool, and if you finish objectives is there some sort of reward?

Yup, all but one are listed here: http://ladderslasher.d2jsp.org/index.php?g=18