The whole idea is that Quetzal, David and Darwin all love E3 and the first 2 circumvent the problem with darwin after a purge. Cutlery+Quetzal/David circumvents high str ice, Darwin+Parasite circunvent low str ice. VBG is the main thing to be able to use Darwin in 1-2 turns after a purge AND being able to stack medium/nerve agent easily after a run. Example: You run once with medium get a counter, then do something else. Does the corp purge? No-click 3 counters on medium and run for a 5 card acess. Yes-run again with medium and say thank you for free 3 clicks.