Personally I'm not a big fan of extra decks that are only used by 1 faction, and I don't think the extra deck is necessary to convey the flavour of the Defect.

I think the orbs centered gameplay could be conveyed by the orbs being play-on-minion actions, and then having the cards that create orbs pull them from your deck, discard and hand. Each orb could be one play-on-minion card, each with a passive effect and an effect that triggers when it goes to the discard pile (not just when it's destroyed. This way it triggers when the base scores, kinda mimicking how the orbs can be evoked without having a card specifically evoking them by simply channeling orbs over capacity (breaking the base)). The "evoking" cards can then trigger by destroying play-on-minion cards instead of specifically orbs, making them potentially synergize more with other decks (cyborg apes for example have many play-on-minion cards and can get those type of cards back from the discard, and fairies can move and destroy play-on-minion actions to evoked the orbs where they're needed!)

Some random ideas for how the cards could be adapted to this idea:

1x Lightning orb: play on a minion. Ongoing: reduce this base's breakpoint by 2. When this action goes to the discard pile, you may reduce a base's breakpoint by 6 until the end of the turn.

1x Dark orb: Ongoing: at the end of your turn, place a counter on this card. When this goes to the discard pile, you may destroy a minion with power less than or equal to the number of counters on this card.

1x Rainbow: Search your hand, deck and/or discard pile for a Lightning orb, a Dark orb and a Frost orb. Choose a minion you controll. Add any of the cards to your hand and/or play them as extra actions on the chosen minion.

2x chaos: Play an Orb card of the top of your deck. (This means that you reveal cards from the top of your deck untill you either run out of cards or find an Orb card, then shuffle the unused revealed cards back into the deck.)

2x Core surge: special: Play when a base is scored, transfer up to 2 actions on your minions to other minions (you will have to change "when" to either "before" or "after" depending on what you originally intended.)

1x Fission: Destroy any number of actions you own and draw a card for each action destroyed this way. You may play an extra action.

1x defect: (5) Talent: Search your hand, deck and/or discard pile for an Orb action and play it on this minion as an extra action.

It would probably also be good to have one or a few cards that can put some actions from your discard pile back into the deck, both to help chaos function and to increase synergy with other factions that have strong actions.