Guild Wars 2

i think that we rangers need to have a trait that give aoe to the arrows like an explosion on hit or so

I actually think we have plenty of it.

Longbow has Volley, it has piercing arrows through traits.
… Our Melee weapons ALL hit 3 targets. Our Off Hand weapons like Axe or Torch can be considered AoE.

We can run Trap Build which provides “tons of damage” °tm of AoE too.
Rangers aren’t in need of any more AoE damage I guess.

Mesmers need more AoE. Rangers are fine for AoE.

Rangers is limited in AoE options, but it is kinda ok, mesmers are in worse position for that matter.

As a ranger you can have a quite good AoE selection, 3 traps, torch #5, axe #5, entangle elite, bows with piercing arrow, LB #5.