Guild Wars 2

Do i get assist kill exp ? just from healing other players,i don’t have to hit the enemy ?

I am trying to level up a Guardian in WvW what weapons should i use to gain the most exp?
I leveled up a Ranger almost entirely from WvW but it was easy because of the long range aoe, i got lot of exp just from killing with the zerg + the events
So how should i play a guardian in WvW just for pure leveling