These missions used to be done with 6 people at 75 I believe, so no doubt 3 or so 90's could do the job no problem.

For the Scouting the Ashu Talif, I've seen a good meat shield (tacos, cocoon, phalanx) paired up with 2 BLM for -ga spells (probably just 1 at 95) make good work of the main waves of mobs. I recall some complications coming up when the imps arrive on board though. Otherwise, keep reraise up, die at a safe distance, raise at a safe distance.

If you repeat the mission enough times to get all of the attachments, you'll no doubt get duplicates to put up on the AH and repay the people helping you do the missions over and over again.

Enjoy.