This color combination gives you access to artifact support like Etherium Sculptor and Whir of Invention to start
In theory 4x Lofty Denial should be plenty, simply because you don't want your opponent to be alive by the time you could cast a Disallow fittingly or they can pay for Lofty meaningfully
$0.45 Altar's Reap Similar effect As an additional cost to cast this spell, sacrifice a creature
That last one would prove to be a problem, actually, as the Commander 2013 cycle of Curses would encourage the table to attack that player to gain an advantage, which Gavin Verhey has since realized was a mistake
Your job is to time removal so your opponent can't get that dual utility out of their spells, and you do this by passing priority
This makes sense as it feels like this set is reminiscent of Core Set power levels - the cards aren't incredibly complicated, and they serve as a way for casual MTG fans, as well as non-MTG playing FINAL FANTASY fans to get into the game