[X] Pin the Maw: John would try to sneak his way from the drug lab while Mercy and Felix's Guards start fighting, distracting the thugs. In this case, John will be alone against the Maw, but he could do it. Shadows Roll with John to ambush the Maw)
[X] Cut the Head off: Felix's Guard will take the brunt of the attack against the thugs while Mercy and John go directly for the Maw. Two against one are odds that the Maw would not survive. (Shadow Roll for John and Mercy for the ambush of the Maw).