In the end, lifelines can be more of a psychological benefits and convenient hand-hold. they are usually too low and two weakly constructor or poorly installed to provide real safety.
?I would suggest an a custom Lifeline bare wire or Dyneema run from the pulpit to the push pit and secured to their shrouds at about head height so you have someplace up towards your chest to be able to grab.
?Too, of course you should have a harness and lanyard and have some inboard place to connect to: hardpoints and/ or Jack lines?