A Techno-Wizard can take that Edge but normally after character creation you have to wait until Seasoned (Born Hero lets you ignore the Rank Requirement)... but if you want to re-work Deezy so she took it at creation and then the Extra Power later that's fine...
Yes... for Varg... hmm suggestions... you have already raised a Trait so you can't do that again until you are Seasoned. Frenzy requires you to be Seasoned Rank and have a Fighting of a d10... you might want to raise your Fighting so that in a couple of advances you can take that Edge (it allows you to attack twice in a round with a melee attack).
You could instead take Extraction which lets you withdraw from melee combat from one person without them getting a free Melee attack against you or you could take First Strike this means that once a round when someone enters melee combat with you, you get a free melee attack against them before they attack you. Trade Mark Weapon also requires a Fighting of a d10 and it gives you +1 to your attack with one melee weapon (Chain Sword)...