How old is she, beansbananas? It's horrid seeing them apparently inconsolable. Mine were babies a long time ago but I'll chuck out some ideas and bump this for you.
I don't know whether gripe water can improve colic in babies but different babies respond to different methods, so you may have to see what works best for her.
The soothing techniques you already use are what I would have suggested - such as, gentle rocking or patting, or baby massage.
When you know she's had a good feed and her nappy's clean lay her down on you, her ear to your heartbeat and cuddle her.
Holding your baby during a crying episodecan sometimes help. Have you tried swaddling her ie wrapping her snugly in a blanket when you put her down to sleep?
My friends with colicky babies swore by a baby sling by day and in the evenings which was when the main crying bouts began, a nice rock in a vibrating baby chair seemed to help pacify them.
Darken the room for daytime naps. She doesn't want stimulation when she's stressed.
Remember your baby is not unwell, it is not your fault and afaik there is no clear evidence that colic has any long-term effects on baby’s health.