I believe don’t triggers, you will steal the weapon with buffs, remaining durability, and all

I really dont get the utility and dont like Archmage Vargoth in this deck. Call to adventure draw him in turn 3, give him +2/+2, in turn 4 summon him with 4/8 using 4 mana, ok. But in turn 4 the enemy aways have minions or spells to kill Vargoth, so I dont even use him in the turn 5, to do a double duel or double prismatic… so, Is he really necessary or I’m using wrong?