When I once got my first Archimonde, I used it to improve my legendary Avenger when I still had my old main account... Yes, I mythed the Avenger with the thought of Avenger being superior because I beat an Archimonde user in a Claw stomp battle (He had 1 Annihilation while I had 2, so I won from extra damage due to more resist break).
... I then lost that main account, so I lost my Claw, LPV, and Valiant Sniper (LPV + Valiant Sniper were on my third build, which was energy)... But hey, I had a redemption arc in the form of my current main, Whiteout.