for an OP baby that wouldn't shift I would recommend sterile water injections, and labouring on all fours. Labouring in water (again on all fours) is great and above all relaxing with the contractions and letting them do their work. If you need pain relief to do that then so be it, the key is to relax as much as possible.
I had sterile water injections last time and also used the bath, what I didn't try was optimal positioning like on all fours. But I was just so exhausted that by the time we realised the problem I'd been up 48 hours already. My MW has suggested that if this bub is OP and I need an epidural again, she will position me on my knees leaning over the bed and get DH and my SMW to hold me there. Actually, she plans on doing that (with my express pre-agreement of course) regardless of what happens in stage 1. If anything I think pushing an OP baby out flat on your back has to be the worst thing ever (a wider part of the head coming out of a narrowed pelvis) so I'm pleased she at least has a plan for stage 2 if things go pearshaped. Just need to deal with stage 1!

I want to have the guts to cancel this IOL!