I was thinking that a quick and easy way to determine this was to simply take your typical human stats, compared to your typical alien, and then adding the difference onto the peak human.... but that got really absurd really fast as I began to work it out for the Shi'ar.
In fact, there are so many variables to be taken into account from attribute to attribute and from race to race that there probably is no quick and easy answer to this one.
But let's try the Shi'ar
Figthing - while I'm sure that in the long history of their culture they have evolved some interesting martial talents, have we ever seen them put to use a la a human fighter the calibre of Captain America? I think humanities infinite potential gives us an edge here, such that, while your average Shi'ar might have an edge on your average human, their best isn't quite up to par with our best. Thus, I wouldn't give them more than an Incredible max.
Agility - the Shi'ar evovled from avians and have always struck me as very graceful and thus coordinated, as the average Shi'ar is a rank higher than your average human, I wouldn't find it absurd to cap their Agility max at Amazing... a cut above max. human and en pare with Spidey or Nightcrawler.
Strength - considering the large gulf that separates Rm and In, coupled with the fact that the Shi'ar evolved from avians and seem so graceful and delicate, I don't see this stat getting any higher than Rm. Some are low end Rm, some are high end Rm, but Shi'ar Strength max's at Rm.
Endurance - most difficult to estimate as the stat is a combo of toughness and stamina, and the physical types that exemplify these qualities in humans stand in stark contrast to each other. A 115 lbs world class marathon runner and a 285 lbs pro.wrestler could conceivably share the same Endurance rank!!! The avain heritage might suggest a lighter structure, as with Angel and the hollow bones he originally(?) had, and thus greater stamina, but also a structure that just isn't as quite a tough as it could be if it's bones, whatever they're made of, were not hollow. Im thinking, maybe peak human, Incredible, as the max for Shi'ar as well.
So that yields peak Shi'ar FASE stats of...
F - Incredible
A - Amazing
S - Remarkable
E - Incredible
As for RIP...
Reason - as the preeminent race of an intergalactic empire their best and brightest likely rival Reed Richards, so Amazing max.
Intuition - their vision may or may not be somewhat sharper or have better peripheral, but it doesn't extend into the superhuman like Prof. X or Spidey's 6th sense, so Incredible max.
Psyche - no reason to think a Shi'ar could not have an indomitable will, but no more reason to think that a non-psychic/non-mystic would higher anymore than a human. Max. Amazing.
R - Amazing
I - Incredible
P - Amazing