Archer is a physical range user and an all rounder character in terms of stats. The main feature of archer is their rising arrow skill and the air-combo button (default key is Z). Air-combo allows archer to shoot airborne targets at a faster rate depending on how fast the user mash the button (there is a cap speed to how fast you can shoot). Damage for air-combo is also reduced by around 30% as compared to normal attack (default 'x' button). Since air-combo can only target airborne targets, what about ground targets? That is where rising arrow comes into play. Rising arrow launches ground opponent into air. It requires only 1 mana for activation and has a fast cool down of 1 second. Both air-combo and rising arrow can hit up to 5 targets making it a great AOE skill too (AOE for air-combo is huge, but AOE for rising arrow is very small). I usually call the combination of rising arrow and air combo; rising combo. Before you start playing archer, be warned that they are the most demanding job in terms of finger strength. In one 4 star map, archer would need to press 'Z' aka air combo for 2500 times. One 4 star map takes 6 mins on average; hence in one hour that would be 25k times. So before you decide to use archer, be prepared to 'kill' your finger

Hunter, like archers, uses bow too. Hunter is geared towards AOE and disabling. [not done]

Ranger is the direct opposite of Hunter. Instead of bow, Ranger uses crossbow and is geared towards single target. The main feature of Ranger is tank and camouflage. Ranger class skills are less useful as compared to archer. But that is compensated with slightly higher weapon damage. In PvP, Ranger works much better than hunter due to the skill called camouflage. This can be seen from the video below: Ranger PvP Video. In PvE, ranger is does quite well too, though the demand of skill level is slightly higher as compared to hunter due to the lack of mob control. In MvP, Ranger works much better than hunter due to higher damage.

Archer Gameplay Video

Here is some of my gameplay video on archer so that you have a better idea how archer works if you are new to Dragonica:

Dragonica Alpha II Archer (Big Bad Wolf 2 Star)

Dragonica Alpha II Archer (Vega 1 Star)

Dragonica Alpha II Archer (Mahalka 1 Star)