(Update: Replaced Captain America, Nick Fury, and White Queen for Falcon, Sif, and Helicarrier). I don't claim to be a pro or anything but I just thought I'd share what's been working for me. Here's my personal breakdown:
Agent 13 Necessary proc for Collector and Bishop. I try not to play her or Mantis t1 unless I have Beast in hand and see some opportunity. I try to place them in a lane that Beast can pick them up without also grabbing Collector or Bishop.
Mantis Same as Agent 13, except saving her is a beneficial because it'll be easier to target a lane for her later in the game when you see what your opponent is doing.
Quinjet Not a wincon per se, but can really help proc Collector and Bishop, especially when paired with Beast. I usually put in a lane with Collector or Bishop so I don't Beast him.
Collector Strangely enough, I wouldn't call him or Bishop wincon in this deck. They are very beneficial as far as racking up power, but a game is still winnable if you haven't even able to place them. Pick a lane to drop immediately.
Beast By t3 I would suggest dedicating a lane to cards you want to bounce with Beast, especially if hes in hand.
Cards I would prioritize bouncing if possible: Agent 13, Mantis, and Agent Coulson. Cards I would avoid bouncing for maximum power: Quinjet, Collector, Bishop.
Falcon - Proc for Collector, allows reuse of Agent and Mantis.
Sentinel Does whatever a Sentitel does.. if you see a situation where you have Collector but no SHIELD Agents or White Queen, I've stacked 2 or 3 Sentinels in a lane and bounced with Beast as a way to counter this. Great combo if you have Quinjet out too.
Bishop Pick a lane, and let him sit back and eat power.
Agent Coulson I know he's new p4 and all, but I got lucky and pulled him (spent my Collector tokens on Shuri and Thanos), but he's totally worth the buy.. the 4 and 5 cost cards combo'd with Quinjet is great, and he's yoinked me Devil Dino a few times which was nice. Can be replaced with Cable.
Sif - Discards Helicarrier for Collector proc.
Helicarrier - Procs Collector, sometimes offers some fun win alternatives .
Thanks for reading, and any feedback is more than welcome!