not a replacement for Prednisone in any sense, but ginger and mint both have nice healing/anti-inflammatory effects. Mint Tea from Starbucks REALLY helped me out just this past weekend in Mexico when I had really bad pain, worst I've had in 2 years. But , Prednisone is a steroid, it's strong and does its job, sadly with side affects :-( Been there, done that.
You mentioned herbal route, have you thought about
a naturopath dr, or traditional chinese medicine(TCM) Doctor. Contact some of your local holistic centers, they can point you in the right direction. Before I go on Prednisone again I'll probably fly to see a Ayurvedic GI specialist recommended by a friend
good luck, I know prednisone isn't fun, hopefully you at least have good energy!!
Blogging UC: http://lifewithcolitis.blogspot.com/
Vegan/Pescatarian - ish, , Yoga, Traditional Chinese Medicine
'00 - UC - Proctitis
Testim 1% - Testosterone
Vit D 50,000 ICU/week