3 pb synergies only.
mastery minimum for infinite parry based from comment from another post: 4/4 pb, 3/3 parry, 3/3 stupefy
(
https://forums.playcontestofchampions.com/en/discussion/96207/labyrinth-s-infinite-parry#latest)
attackers are 6s 1/25 rr sig0, 5s 5/65 hyp sig0, 1 free slot for 5s 5/65 or 6s utility champ.