One trick I have found that really brings Quicksilver up to another level is knowing when to flip to alter ego. If you already have Friction Resistance (the best card in the game) and Serval Industries out then just flip down to alter ego on the turn when there are between 9-5 cards left in your deck. Check your discard pile. If there 2 Maximum Velocity left then shuffle 1 Maximum Velocity and 1 Always Be Running back into your deck on the turn you go down otherwise shuffle 2 Always Be Running.
On your next turn in alter ego form 1st shuffle 2 more Always Be Running into your deck. Then look at your hand. Depending on how many of the good cards you drew you and how many cards are left in the deck you can either use Superpowered Siblings to discard 2 cards to hopefully draw the last 2 always be runnings or just wait until the next turn if the majority of the cards are still in the hero deck. (The goal is too have as many of them together in a single turn as possible.)
Best case scenario is this. You go down with 5 cards left in the deck with 1 Running or Maximum still in there. You go down to alter ego and shuffle 2 more into the deck leaving 7 cards in it. Next turn you draw 6 cards leaving 1 card in the deck. You shuffle 2 more into the deck making it now 3 cards in the hero deck. You use Superpowered Siblings to discard 2 cards and draw 2 to hopefully draw the cards you just shuffled into the deck.
You will be doing 1(Base ATK)+2(Max V)+1(Reinforced Sinew) X 6(4 always be runnings and his normal 2 activations)=30 damage. If you have Combat Training, #3 Adrenaline Rush, you can increase that to 48. This can be done fairly reliably each time you are close to decking.
Personally I think this now makes Quicksilver the most powerful hero in the game for multiplayer. (I even think there is now an argument to nerfing him a little bit as this is a ridiculous amount of damage in a single turn.) You can obviously also remove tons of threat instead with Heroic Intuition and Civic Duty.