I need both 5-1 and 5-2 as well, I already have the mission started and have the key item seal to replace the one that is fading, that was a while ago so if there is any other pre-fighting stuff I will still need to do it. I am also a THF but not as high as you, only 55 atm. Have both NIN and WAR to sub if that matters at all. Some monks would be nice since we beat down on skele's for most of the mission from what I have heard.
Usually am on around 10pm PST till about 1-3am unless I work early the next day, send me a tell if you see me in game. Lets get rank 5 behind us! ^^