How does Perfect Offensive (Striker Tension), and Piledriver interact?

Lilly the Drunk is unhappy with Steve the Sober so she grapples poor Steve. After pinning Steve, Lilly activates a Piledriver ending the grapple and automatically threatening a critical hit. Can she use Perfect Offensive to auto confirm the crit?

When does Drunken Boxer's maximize damage come into play?

Lilly the Drunk is at it again, slamming a bottle of rotgut. As she already has Improved Unarmed Strike, she is considered to be one size category large for the purposes of unarmed damage. In this case, 1d6 to 1d8. She attacks Steve and decides to expend her Drunk status to maximize her unarmed dice. Does she deal 6 or 8 damage?