The concept here is ultimately creating a grand mass of point ramping and empowering.
Elsa provides the topping for each field when a location has 3 cards in them.
Nico's release has given the deck versatility beyond what I ever imagined. Destroying a useless card in hand to draw two more, copy Elsa or Kitty Pride, Shunt a card from angela's field to the side, change a card in hand into an easy to bounce demon, or even buff up her own power or the power of another when applied.
Combine with Elsa and bounce, and you got yourself a gal who's a swiss army card. Having her in the bounce deck means she can provide numerous uses at a time each casting.
Kitty pryde's own self bouncing allows her to gain points each bump, while landing on locations with which let her gain points from Elsa.
Angela ramps with playing cards on her locale, while also using bounce methods to clear her space quick or move her elsewhere.
Falcon and Beast help bounce back cards from the field to make room for more changes in where you play. Beast reduces cards he bounces back in one location, while Falcon bounces back all cards of 1 cost back on every location.
Now Hood is a very interesting point. He can be sacrificed in a destruction location, or be used for the bar to nowhere to win a victory in that location spot. Or you can play Bast to make him a net 3 power positive at a location in one go. The Demon he spawns each time he's bounced gives a 6 power 1 cost card each time.
Bishop benefits the most from these bounce and play styles of each cards synergy. Each time a card is played, it also ramps up his power by 1 again and again.
Now Magik is ... an interesting addition even in my thought process. She gives one extra round while getting rid of a location you can't handle playing on. That extra round can be used to play hit monkey on one round, and use Beast to bounce him back to play again at -1 cost.
and hit monkey ... oh hit monkey... Now this is a fun little beastie. Playing him on any earlier turn, bouncing him back, and playing him again in spaces where he can gain ramping points from Forge or Elsa ... Combine with playing a Mysterio to add more cards to the field... ho boy.
and mysterio himself. Play bast on him to make all his illusions 3 power, toss on the field, and make him activate when all 3 locations are full to get +3 power in each location from Elsa. Study has shown that forge only buffs the first mysterio that manifests in this regard though.
And bast has been pointed out a few times in this. Her ability to buff all the other low power cards can be quite potent, along with making Angela and Hood get a head start on winning a location on their own. She can even be bounced back on turn 4 ( or 5 depending on magik) to re-buff any newly drawn cards that you acquire the next turn before last (or just be a final card thrown out if you used beast to bounce her).
Counters are definitely cards like wave, Mobius, electro thrown on your field by a viper, Man Thing, or sandman. Run into those cards, and you might as well switch magik for your own mobius. That, or switch with Rogue to steal another mobius or luke cage from your opponent due to the current meta.