Another issue regarding Archer skills I found to be strange was the fact that our "Lunatic Fire" Aoe skill costs an insane 45 rage to cast. Now consider this ;
Mage Aoe 's
1 -->(16 Rage) Rain Of Fire lv 5 = 140% M.Dam to all enemies + 25% QTE 10 Sec Cooldown
2 -->(30 Rage) Meteoric Storm lv 3 = +136% M.Dam to ALL enemies + 25% QTE 15 second cooldown.
Each AOE hits ALL enemies multiple times, Deals Magic Damage (which both Knight and Archer are substantially weaker to), and EITHER skill can be cast 1st turn at the start of battle.
Now take a look at an Archer's "Lunatic Fire" AOE skill ;
(45 Rage) Lunatic Fire lv 3 = 104% damage to all enemies, +10% Crit Rate. 20 Second cooldown, +25% QTE.
Lunatic Fire lv 4 = 134% Damage to all enemies, +10 Crit Rate, 20 Second CD, +25% QTE. (Hits 3 times per target.)
1 -->(16 Rage) Rain Of Fire lv 4 = 134% M.Dam to all enemies + 25% QTE 10 Sec Cooldown(Hits 2 times per target)
2 -->(30 Rage) Meteoric Storm lv 3 = +136% M.Dam to ALL enemies + 25% QTE 15 second cooldown.(Hits 2 times per target)
Mages AoE hits less times per target than Archers and Knights AoE each of them hits 3 times per target while Mages only twice. Mages are also weak against physical attack so you saying that archers and knights are weak against mage it goes hand in hand.
Mage Rage gain: 2 Rage per time damaging an opponent.
Knight Rage gain: 10 Rage per action.
Archer Rage gain: 5 Rage Per critical.
Against a Group of 3, Knight can gain max of 10 Rage per AoE.
Against a Group of 3, Mages can gain max 12 Rage per AoE.(6 rage for one of the AoEs)
Against a Group of 3, Archer can gain max 45 Rage per AoE.