Final cut pro X takes hours to export a file with lots of images
I found in the end the easiest way was to leave the video to render everything as I hadnt done this, it took about six or seven hours to do but once done the actual sharing in h264 format only took about an hour to do, which isn't that bad.

I could change the share version to video and audio and then pick prores but the resultant file would have been nearly 40gb! I have no idea how long it'd take to spit that out, possibly shorter than the rendering and sharing time of the other filetype combined but then I'd have a file approximately 7-8 times the size and not suitable for uploading online/to youtube etc, and any resizing that I'd need to do would probably end up taking an extra chunk of time as well, in the end I'll just make sure I have my projects render overnight before I need to do stuff with them...