it's up to u, dual wield was started from lvl 105, 107, 109, 111 until lvl 132.
maybe at lvl 105 until 120 dont use skill "dual wield" because your p.attack, critical, evasion was decrease very very low, use AK + aias shield. At lvl 121 u can use skill "dual wield" but stay decrease p.a, crit, eva but not very very low like a lvl 105 until 120.