With a deck that loves to cast big creatures, the rest of a Ruby Commander deck should focus on empowering those big-mana critters and ensuring that you're able to refill your hand after you cast all those ramp spells
Jetmir, Nexus of Revels The more creatures you have, the better
Those are safer to treat as actual creatures on your mana curve, whereas cards like Summon: Primal Garuda and Summon: Esper Ramuh are closer to sorceries than creatures
It seems impossible to play the classic blue tempo deck in Modern these days, but a deck full of Hookblade Veteran and other cheap assassins in blue running Escape Detection, Flare of Denial and other cheap interaction cards seems tempting if probably futile
Love his power level loads
You can also stock your graveyard and one-shot your opponents with a card like Living Death or Bojuka Bog targeting yourself, as of course Syr Konrad isn't limited by a "one or more" clause